Taxa recorded in the database
| Scientific name | Taxonomic status (WFO) | Accepted name | Number of samples | More Infos |
|---|---|---|---|---|
| Abarema mataybifolia | Synonym | Jupunba mataybifolia | 1 | |
| Abies alba | Accepted | Abies alba | 1 | |
| Abies balsamea | Accepted | Abies balsamea | 1 | |
| Abies sibirica | Accepted | Abies sibirica | 1 | |
| Abuta | Accepted | Abuta | 1 | |
| Abutilon theophrasti | Accepted | Abutilon theophrasti | 1 | |
| Acacia dealbata | Accepted | Acacia dealbata | 1 | |
| Acacia nilotica | Synonym | Vachellia nilotica | 1 | |
| Acalypha virginica | Accepted | Acalypha virginica | 1 | |
| Acanthus hungaricus | Accepted | Acanthus hungaricus | 1 | |
| Aceras anthropophorum | Synonym | Orchis anthropophora | 1 | |
| Acer campestre | Accepted | Acer campestre | 1 | |
| Acer monspessulanum | Accepted | Acer monspessulanum | 1 | |
| Acer monspessulanum subsp. martini | Synonym | Acer × martini | 1 | |
| Acer negundo | Accepted | Acer negundo | 1 | |
| Acer opalus | Accepted | Acer opalus | 1 | |
| Acer platanoides | Accepted | Acer platanoides | 2 | |
| Acer pseudoplatanus | Accepted | Acer pseudoplatanus | 2 | |
| Achatocarpus nigricans | Accepted | Achatocarpus nigricans | 1 | |
| Achillea ageratum | Accepted | Achillea ageratum | 1 | |
| Achillea aspleniifolia | Synonym | Achillea × obscura | 1 | |
| Achillea atrata | Accepted | Achillea atrata | 1 | |
| Achillea clavennae | Accepted | Achillea clavennae | 1 | |
| Achillea clusiana | Accepted | Achillea clusiana | 1 | |
| Achillea collina | Accepted | Achillea collina | 2 | |
| Achillea crithmifolia | Accepted | Achillea crithmifolia | 2 | |
| Achillea distans | Accepted | Achillea distans | 2 | |
| Achillea erba-rotta | Accepted | Achillea erba-rotta | 1 | |
| Achillea erba-rotta subsp. ambigua | Synonym | Achillea erba-rotta subsp. moschata | 1 | |
| Achillea erba-rotta subsp. moschata | Synonym | Achillea erba-rotta subsp. moschata | 1 | |
| Achillea filipendulina | Accepted | Achillea filipendulina | 1 | |
| Achillea macrophylla | Accepted | Achillea macrophylla | 1 | |
| Achillea millefolium | Accepted | Achillea millefolium | 2 | |
| Achillea millefolium subsp. borealis | Synonym | Achillea millefolium | 1 | |
| Achillea millefolium subsp. millefolium | Synonym | Achillea millefolium | 1 | |
| Achillea millefolium subsp. sudetica | Synonym | Achillea millefolium subsp. alpestris | 2 | |
| Achillea nana | Accepted | Achillea nana | 1 | |
| Achillea nobilis | Accepted | Achillea nobilis | 1 | |
| Achillea odorata | Accepted | Achillea odorata | 1 | |
| Achillea oxyloba | Accepted | Achillea oxyloba | 1 | |
| Achillea oxyloba subsp. schurii | Accepted | Achillea oxyloba subsp. schurii | 1 | |
| Achillea pannonica | Accepted | Achillea pannonica | 1 | |
| Achillea ptarmica | Accepted | Achillea ptarmica | 2 | |
| Achillea roseo-alba | Accepted | Achillea roseo-alba | 1 | |
| Achillea setacea | Accepted | Achillea setacea | 1 | |
| Achillea stricta | Unchecked | 1 | ||
| Achillea tomentosa | Accepted | Achillea tomentosa | 1 | |
| Achnatherum calamagrostis | Accepted | Achnatherum calamagrostis | 1 | |
| Acicarpha tribuloides | Accepted | Acicarpha tribuloides | 1 | |
| Acinos alpinus | Accepted | Acinos alpinus | 1 | |
| Acinos arvensis | Synonym | Clinopodium acinos | 1 | |
| Aconitum | Accepted | Aconitum | 1 | |
| Aconitum angustifolium | Accepted | Aconitum angustifolium | 1 | |
| Aconitum anthora | Accepted | Aconitum anthora | 1 | |
| Aconitum burnatii | Accepted | Aconitum burnatii | 1 | |
| Aconitum degenii subsp. valesiacum | Accepted | Aconitum degenii subsp. valesiacum | 1 | |
| Aconitum delphinifolium | Accepted | Aconitum delphinifolium | 1 | |
| Aconitum firmum | Accepted | Aconitum firmum | 1 | |
| Aconitum firmum subsp. moravicum | Accepted | Aconitum firmum subsp. moravicum | 1 | |
| Aconitum lycoctonum | Accepted | Aconitum lycoctonum | 1 | |
| Aconitum lycoctonum subsp. neapolitanum | Synonym | Aconitum lamarckii | 1 | |
| Aconitum lycoctonum subsp. vulparia | Synonym | Aconitum vulparia | 1 | |
| Aconitum moldavicum | Accepted | Aconitum moldavicum | 1 | |
| Aconitum napellus | Accepted | Aconitum napellus | 1 | |
| Aconitum napellus subsp. lusitanicum | Accepted | Aconitum napellus subsp. lusitanicum | 1 | |
| Aconitum napellus subsp. tauricum | Synonym | Aconitum tauricum | 1 | |
| Aconitum napellus subsp. vulgare | Accepted | Aconitum napellus subsp. vulgare | 1 | |
| Aconitum rostratum | Synonym | Aconitum variegatum | 1 | |
| Aconitum septentrionale | Accepted | Aconitum septentrionale | 1 | |
| Aconitum variegatum subsp. paniculatum | Synonym | Aconitum degenii subsp. paniculatum | 1 | |
| Aconitum variegatum subsp. valesiacum | Synonym | Aconitum degenii subsp. valesiacum | 1 | |
| Aconogonon divaricatum | Unchecked | 1 | ||
| Acorus calamus | Accepted | Acorus calamus | 2 | |
| Actaea rubra | Accepted | Actaea rubra | 1 | |
| Actaea spicata | Accepted | Actaea spicata | 2 | |
| Actinidia | Accepted | Actinidia | 1 | |
| Adenophora liliifolia | Accepted | Adenophora liliifolia | 1 | |
| Adenostyles alliariae | Accepted | Adenostyles alliariae | 2 | |
| Adenostyles glabra | Synonym | Adenostyles alpina subsp. alpina | 1 | |
| Adenostyles leucophylla | Accepted | Adenostyles leucophylla | 1 | |
| Adiantum capillus-veneris | Accepted | Adiantum capillus-veneris | 1 | |
| Adonis aestivalis subsp. aestivalis | Synonym | Adonis aestivalis | 1 | |
| Adonis aestivalis subsp. squarrosa | Accepted | Adonis aestivalis subsp. squarrosa | 1 | |
| Adonis annua | Accepted | Adonis annua | 1 | |
| Adonis flammea | Accepted | Adonis flammea | 1 | |
| Adonis pyrenaica | Accepted | Adonis pyrenaica | 1 | |
| Adonis vernalis | Accepted | Adonis vernalis | 1 | |
| Adoxa moschatellina | Accepted | Adoxa moschatellina | 2 | |
| Aechmea bromeliifolia | Accepted | Aechmea bromeliifolia | 1 | |
| Aegilops cylindrica | Accepted | Aegilops cylindrica | 1 | |
| Aegilops neglecta | Accepted | Aegilops neglecta | 1 | |
| Aegilops ovata | Synonym | Aegilops neglecta | 1 | |
| Aegilops triuncialis | Accepted | Aegilops triuncialis | 1 | |
| Aegopodium podagraria | Accepted | Aegopodium podagraria | 2 | |
| Aeluropus littoralis | Accepted | Aeluropus littoralis | 1 | |
| Aesculus hippocastanum | Accepted | Aesculus hippocastanum | 1 | |
| Aethionema | Accepted | Aethionema | 1 | |
| Aethionema saxatile subsp. ovalifolium | Accepted | Aethionema saxatile subsp. ovalifolium | 1 | |
| Aethionema saxatile subsp. saxatile | Synonym | Aethionema saxatile | 1 | |
| Aethionema thomasianum | Accepted | Aethionema thomasianum | 1 | |
| Aethusa cynapium | Accepted | Aethusa cynapium | 2 | |
| Afrostyrax lepidophyllus | Accepted | Afrostyrax lepidophyllus | 1 | |
| Agave americana | Accepted | Agave americana | 1 | |
| Agonandra silvatica | Accepted | Agonandra silvatica | 1 | |
| Agrimonia eupatoria | Accepted | Agrimonia eupatoria | 2 | |
| Agrimonia procera | Accepted | Agrimonia procera | 1 | |
| Agropyron cristatum | Accepted | Agropyron cristatum | 1 | |
| Agropyron pectinatum | Synonym | Agropyron cristatum | 1 | |
| Agrostemma githago | Accepted | Agrostemma githago | 1 | |
| Agrostis alpina | Accepted | Agrostis alpina | 1 | |
| Agrostis anadyrensis | Accepted | Agrostis anadyrensis | 1 | |
| Agrostis canina | Accepted | Agrostis canina | 3 | |
| Agrostis capillaris | Accepted | Agrostis capillaris | 3 | |
| Agrostis clavata | Accepted | Agrostis clavata | 1 | |
| Agrostis exarata | Accepted | Agrostis exarata | 1 | |
| Agrostis gigantea | Accepted | Agrostis gigantea | 2 | |
| Agrostis kudoi | Synonym | Agrostis vinealis | 1 | |
| Agrostis mertensii | Accepted | Agrostis mertensii | 2 | |
| Agrostis rupestris | Accepted | Agrostis rupestris | 1 | |
| Agrostis scabra | Accepted | Agrostis scabra | 1 | |
| Agrostis schleicheri | Accepted | Agrostis schleicheri | 1 | |
| Agrostis schraderiana | Accepted | Agrostis schraderiana | 1 | |
| Agrostis stolonifera | Accepted | Agrostis stolonifera | 2 | |
| Agrostis vinealis | Accepted | Agrostis vinealis | 3 | |
| Ailanthus altissima | Accepted | Ailanthus altissima | 1 | |
| Aiouea saligna | Accepted | Aiouea saligna | 2 | |
| Aira elegantissima | Accepted | Aira elegantissima | 1 | |
| Airopsis tenella | Accepted | Airopsis tenella | 1 | |
| Ajuga chamaepitys | Accepted | Ajuga chamaepitys | 1 | |
| Ajuga genevensis | Accepted | Ajuga genevensis | 1 | |
| Ajuga pyramidalis | Accepted | Ajuga pyramidalis | 2 | |
| Ajuga reptans | Accepted | Ajuga reptans | 2 | |
| Alcea rosea | Accepted | Alcea rosea | 1 | |
| Alchemilla | Accepted | Alchemilla | 1 | |
| Alchemilla alpigena | Accepted | Alchemilla alpigena | 1 | |
| Alchemilla alpina | Accepted | Alchemilla alpina | 2 | |
| Alchemilla baltica | Accepted | Alchemilla baltica | 1 | |
| Alchemilla borealis | Accepted | Alchemilla borealis | 1 | |
| Alchemilla chirophylla | Accepted | Alchemilla chirophylla | 1 | |
| Alchemilla conjuncta | Accepted | Alchemilla conjuncta | 1 | |
| Alchemilla coriacea | Accepted | Alchemilla coriacea | 1 | |
| Alchemilla cymatophylla | Accepted | Alchemilla cymatophylla | 1 | |
| Alchemilla fallax | Accepted | Alchemilla fallax | 1 | |
| Alchemilla filicaulis | Accepted | Alchemilla filicaulis | 1 | |
| Alchemilla filicaulis subsp. filicaulis | Synonym | Alchemilla filicaulis | 1 | |
| Alchemilla filicaulis subsp. vestita | Synonym | Alchemilla filicaulis | 1 | |
| Alchemilla fissa | Accepted | Alchemilla fissa | 1 | |
| Alchemilla flabellata | Accepted | Alchemilla flabellata | 1 | |
| Alchemilla glabra | Accepted | Alchemilla glabra | 2 | |
| Alchemilla glaucescens | Accepted | Alchemilla glaucescens | 2 | |
| Alchemilla glomerulans | Accepted | Alchemilla glomerulans | 1 | |
| Alchemilla heptagona | Accepted | Alchemilla heptagona | 1 | |
| Alchemilla hirsuticaulis | Accepted | Alchemilla hirsuticaulis | 1 | |
| Alchemilla hybrida | Accepted | Alchemilla hybrida | 1 | |
| Alchemilla incisa | Accepted | Alchemilla incisa | 1 | |
| Alchemilla micans | Accepted | Alchemilla micans | 1 | |
| Alchemilla mollis | Accepted | Alchemilla mollis | 2 | |
| Alchemilla monticola | Accepted | Alchemilla monticola | 2 | |
| Alchemilla murbeckiana | Accepted | Alchemilla murbeckiana | 1 | |
| Alchemilla norvegica | Unchecked | 1 | ||
| Alchemilla pentaphyllea | Accepted | Alchemilla pentaphyllea | 1 | |
| Alchemilla plicata | Accepted | Alchemilla plicata | 1 | |
| Alchemilla propinqua | Accepted | Alchemilla propinqua | 1 | |
| Alchemilla sarmatica | Accepted | Alchemilla sarmatica | 1 | |
| Alchemilla saxatilis | Accepted | Alchemilla saxatilis | 1 | |
| Alchemilla semilunaris | Accepted | Alchemilla semilunaris | 1 | |
| Alchemilla subcrenata | Accepted | Alchemilla subcrenata | 1 | |
| Alchemilla vetteri | Accepted | Alchemilla vetteri | 1 | |
| Alchemilla vulgaris | Accepted | Alchemilla vulgaris | 1 | |
| Alchemilla wichurae | Accepted | Alchemilla wichurae | 1 | |
| Alchemilla xanthochlora | Accepted | Alchemilla xanthochlora | 2 | |
| Aldrovanda vesiculosa | Accepted | Aldrovanda vesiculosa | 1 | |
| Alexa wachenheimii | Accepted | Alexa wachenheimii | 1 | |
| Alisma lanceolatum | Accepted | Alisma lanceolatum | 1 | |
| Alisma plantago-aquatica | Accepted | Alisma plantago-aquatica | 2 | |
| Alkanna tinctoria | Accepted | Alkanna tinctoria | 1 | |
| Alliaria petiolata | Accepted | Alliaria petiolata | 2 | |
| Allium acutiflorum | Accepted | Allium acutiflorum | 1 | |
| Allium angulosum | Accepted | Allium angulosum | 1 | |
| Allium carinatum | Accepted | Allium carinatum | 1 | |
| Allium carinatum subsp. pulchellum | Accepted | Allium carinatum subsp. pulchellum | 1 | |
| Allium cepa | Accepted | Allium cepa | 1 | |
| Allium ericetorum | Accepted | Allium ericetorum | 1 | |
| Allium flavum | Accepted | Allium flavum | 1 | |
| Allium insubricum | Accepted | Allium insubricum | 1 | |
| Allium lineare | Accepted | Allium lineare | 2 | |
| Allium lusitanicum | Accepted | Allium lusitanicum | 1 | |
| Allium moschatum | Accepted | Allium moschatum | 1 | |
| Allium narcissiflorum | Accepted | Allium narcissiflorum | 1 | |
| Allium neapolitanum | Accepted | Allium neapolitanum | 1 | |
| Allium obliquum | Accepted | Allium obliquum | 1 | |
| Allium ochroleucum | Synonym | Allium fistulosum | 1 | |
| Allium oleraceum | Accepted | Allium oleraceum | 2 | |
| Allium oporinanthum | Synonym | Allium paniculatum subsp. paniculatum | 1 | |
| Allium paniculatum | Accepted | Allium paniculatum | 1 | |
| Allium paradoxum | Accepted | Allium paradoxum | 2 | |
| Allium polyanthum | Synonym | Allium ampeloprasum | 2 | |
| Allium roseum | Accepted | Allium roseum | 2 | |
| Allium rotundum | Accepted | Allium rotundum | 1 | |
| Allium scaberrimum | Accepted | Allium scaberrimum | 1 | |
| Allium schoenoprasum | Accepted | Allium schoenoprasum | 3 | |
| Allium scorodoprasum | Accepted | Allium scorodoprasum | 1 | |
| Allium sphaerocephalon | Accepted | Allium sphaerocephalon | 1 | |
| Allium suaveolens | Accepted | Allium suaveolens | 1 | |
| Allium ursinum | Accepted | Allium ursinum | 1 | |
| Allium ursinum subsp. ucrainicum | Synonym | Allium ursinum | 1 | |
| Allium victorialis | Accepted | Allium victorialis | 2 | |
| Allium vineale | Accepted | Allium vineale | 1 | |
| Alloteropsis paniculata | Accepted | Alloteropsis paniculata | 1 | |
| Alluaudia humbertii | Accepted | Alluaudia humbertii | 1 | |
| Alnus alnobetula | Accepted | Alnus alnobetula | 1 | |
| Alnus alnobetula subsp. suaveolens | Accepted | Alnus alnobetula subsp. suaveolens | 1 | |
| Alnus cordata | Accepted | Alnus cordata | 2 | |
| Alnus crispa | Synonym | Alnus alnobetula subsp. crispa | 1 | |
| Alnus glutinosa | Accepted | Alnus glutinosa | 3 | |
| Alnus glutinosa subsp. barbata | Accepted | Alnus glutinosa subsp. barbata | 1 | |
| Alnus glutinosa subsp. betuloides | Accepted | Alnus glutinosa subsp. betuloides | 1 | |
| Alnus incana | Accepted | Alnus incana | 4 | |
| Alnus incana subsp. kolaensis | Accepted | Alnus incana subsp. kolaensis | 1 | |
| Alnus incana subsp. kolaensis | Accepted | Alnus incana subsp. kolaensis | 1 | |
| Alnus jorullensis | Accepted | Alnus jorullensis | 1 | |
| Alnus maritima | Accepted | Alnus maritima | 1 | |
| Alnus maximowiczii | Accepted | Alnus maximowiczii | 1 | |
| Alnus orientalis | Accepted | Alnus orientalis | 1 | |
| Alnus rubra | Accepted | Alnus rubra | 1 | |
| Alnus viridis | Synonym | Alnus alnobetula | 1 | |
| Alnus viridis subsp. crispa | Synonym | Alnus alnobetula subsp. crispa | 1 | |
| Alnus viridis subsp. fruticosa | Synonym | Alnus alnobetula subsp. fruticosa | 1 | |
| Alopecurus aequalis | Accepted | Alopecurus aequalis | 2 | |
| Alopecurus alpinus | Accepted | Alopecurus alpinus | 2 | |
| Alopecurus arundinaceus | Accepted | Alopecurus arundinaceus | 1 | |
| Alopecurus bulbosus | Accepted | Alopecurus bulbosus | 1 | |
| Alopecurus geniculatus | Accepted | Alopecurus geniculatus | 2 | |
| Alopecurus magellanicus | Accepted | Alopecurus magellanicus | 3 | |
| Alopecurus myosuroides | Accepted | Alopecurus myosuroides | 1 | |
| Alopecurus pratensis | Accepted | Alopecurus pratensis | 4 | |
| Alopecurus pratensis subsp. laguriformis | Accepted | Alopecurus pratensis subsp. laguriformis | 1 | |
| Alopecurus rendlei | Accepted | Alopecurus rendlei | 1 | |
| Althaea cannabina | Accepted | Althaea cannabina | 1 | |
| Althaea hirsuta | Synonym | Malva cretica | 1 | |
| Althaea officinalis | Accepted | Althaea officinalis | 1 | |
| Alyssoides utriculata | Accepted | Alyssoides utriculata | 2 | |
| Alyssum alpestre | Accepted | Alyssum alpestre | 1 | |
| Alyssum alyssoides | Accepted | Alyssum alyssoides | 1 | |
| Alyssum argenteum | Synonym | Odontarrhena argentea | 1 | |
| Alyssum cuneifolium | Accepted | Alyssum cuneifolium | 1 | |
| Alyssum ligusticum | Synonym | Hormathophylla halimifolia | 1 | |
| Alyssum montanum subsp. montanum | Synonym | Alyssum montanum | 1 | |
| Alyssum murale | Synonym | Odontarrhena alpestris | 1 | |
| Alyssum ovirense | Synonym | Alyssum wulfenianum subsp. ovirense | 1 | |
| Alyssum repens | Accepted | Alyssum repens | 1 | |
| Alyssum repens subsp. repens | Synonym | Alyssum repens | 1 | |
| Alyssum serpyllifolium | Accepted | Alyssum serpyllifolium | 1 | |
| Alyssum simplex | Accepted | Alyssum simplex | 1 | |
| Alyssum wulfenianum | Accepted | Alyssum wulfenianum | 1 | |
| Amaranthus albus | Accepted | Amaranthus albus | 1 | |
| Amaranthus blitoides | Accepted | Amaranthus blitoides | 1 | |
| Amaranthus blitum | Accepted | Amaranthus blitum | 1 | |
| Amaranthus bouchonii | Synonym | Amaranthus powellii subsp. bouchonii | 1 | |
| Amaranthus cruentus | Accepted | Amaranthus cruentus | 1 | |
| Amaranthus deflexus | Accepted | Amaranthus deflexus | 1 | |
| Amaranthus graecizans | Accepted | Amaranthus graecizans | 1 | |
| Amaranthus hybridus | Accepted | Amaranthus hybridus | 2 | |
| Amaranthus retroflexus | Accepted | Amaranthus retroflexus | 2 | |
| Ambelania acida | Accepted | Ambelania acida | 1 | |
| Ambrosia artemisiifolia | Accepted | Ambrosia artemisiifolia | 2 | |
| Ambrosia psilostachya | Accepted | Ambrosia psilostachya | 1 | |
| Ambrosia tenuifolia | Accepted | Ambrosia tenuifolia | 1 | |
| Amelanchier ovalis | Accepted | Amelanchier ovalis | 1 | |
| Amelanchier ovalis subsp. embergeri | Unchecked | 1 | ||
| Ammi majus | Accepted | Ammi majus | 2 | |
| Ammophila arenaria | Accepted | Ammophila arenaria | 1 | |
| Amorpha fruticosa | Accepted | Amorpha fruticosa | 1 | |
| Amphirrhox longifolia | Accepted | Amphirrhox longifolia | 1 | |
| Anacampseros arachnoides | Accepted | Anacampseros arachnoides | 1 | |
| Anacamptis coriophora | Accepted | Anacamptis coriophora | 1 | |
| Anacamptis pyramidalis | Accepted | Anacamptis pyramidalis | 1 | |
| Anacardium spruceanum | Accepted | Anacardium spruceanum | 1 | |
| Anacyclus clavatus | Accepted | Anacyclus clavatus | 1 | |
| Anagallis arvensis | Synonym | Lysimachia arvensis | 1 | |
| Anagallis foemina | Synonym | Lysimachia foemina | 1 | |
| Anagallis minima | Synonym | Lysimachia minima | 1 | |
| Anagallis tenella | Synonym | Lysimachia tenella | 1 | |
| Anarrhinum bellidifolium | Accepted | Anarrhinum bellidifolium | 1 | |
| Anarthria prolifera | Accepted | Anarthria prolifera | 1 | |
| Anartia meyeri | Synonym | Tabernaemontana undulata | 1 | |
| Anchusa arvensis | Accepted | Anchusa arvensis | 1 | |
| Anchusa barrelieri | Synonym | Cynoglottis barrelieri | 1 | |
| Anchusa hybrida | Accepted | Anchusa hybrida | 1 | |
| Anchusa italica | Synonym | Anchusa azurea | 1 | |
| Anchusa ochroleuca | Accepted | Anchusa ochroleuca | 1 | |
| Anchusa officinalis | Accepted | Anchusa officinalis | 1 | |
| Andromeda polifolia | Accepted | Andromeda polifolia | 2 | |
| Andromeda polifolia subsp. glaucophylla | Accepted | Andromeda polifolia subsp. glaucophylla | 1 | |
| Androsace adfinis subsp. brigantiaca | Unchecked | 1 | ||
| Androsace adfinis subsp. puberula | Accepted | Androsace adfinis subsp. puberula | 1 | |
| Androsace alpina | Accepted | Androsace alpina | 1 | |
| Androsace brachystegia | Accepted | Androsace brachystegia | 1 | |
| Androsace brevis | Accepted | Androsace brevis | 2 | |
| Androsace cantabrica | Synonym | Androsace adfinis | 1 | |
| Androsace carnea subsp. rosea | Synonym | Androsace halleri | 1 | |
| Androsace chaixii | Accepted | Androsace chaixii | 1 | |
| Androsace chamaejasme | Accepted | Androsace chamaejasme | 3 | |
| Androsace ciliata | Accepted | Androsace ciliata | 1 | |
| Androsace cylindrica subsp. hirtella | Accepted | Androsace cylindrica subsp. hirtella | 1 | |
| Androsace cylindrica subsp. willkommii | Synonym | Androsace cylindrica | 1 | |
| Androsace dasyphylla | Accepted | Androsace dasyphylla | 1 | |
| Androsace delavayi | Accepted | Androsace delavayi | 1 | |
| Androsace delphinensis | Unchecked | 2 | ||
| Androsace globifera | Accepted | Androsace globifera | 1 | |
| Androsace halleri | Accepted | Androsace halleri | 2 | |
| Androsace halleri subsp. nuria | Accepted | Androsace halleri subsp. nuria | 4 | |
| Androsace hausmannii | Accepted | Androsace hausmannii | 1 | |
| Androsace hedraeantha | Accepted | Androsace hedraeantha | 1 | |
| Androsace helvetica | Accepted | Androsace helvetica | 2 | |
| Androsace hirtella | Synonym | Androsace cylindrica | 1 | |
| Androsace lactea | Accepted | Androsace lactea | 12 | |
| Androsace lactiflora | Accepted | Androsace lactiflora | 1 | |
| Androsace laggeri | Accepted | Androsace laggeri | 1 | |
| Androsace lehmanniana | Accepted | Androsace lehmanniana | 1 | |
| Androsace mariae | Synonym | Androsace tibetica var. mariae | 1 | |
| Androsace mathildae | Accepted | Androsace mathildae | 2 | |
| Androsace maxima | Accepted | Androsace maxima | 1 | |
| Androsace mucronifolia | Accepted | Androsace mucronifolia | 1 | |
| Androsace obtusifolia | Accepted | Androsace obtusifolia | 1 | |
| Androsace primuloides | Synonym | Androsace sarmentosa subsp. primuloides | 1 | |
| Androsace pubescens | Accepted | Androsace pubescens | 3 | |
| Androsace pyrenaica | Accepted | Androsace pyrenaica | 2 | |
| Androsace rioxana | Accepted | Androsace rioxana | 5 | |
| Androsace sarmentosa | Accepted | Androsace sarmentosa | 1 | |
| Androsace saussurei | Unchecked | 2 | ||
| Androsace sempervivoides | Accepted | Androsace sempervivoides | 1 | |
| Androsace septentrionalis | Accepted | Androsace septentrionalis | 2 | |
| Androsace tanggulashanensis | Accepted | Androsace tanggulashanensis | 1 | |
| Androsace tapete | Accepted | Androsace tapete | 2 | |
| Androsace triflora | Accepted | Androsace triflora | 1 | |
| Androsace vandellii | Synonym | Androsace alpina | 45 | |
| Androsace vesulensis | Unchecked | 1 | ||
| Androsace villosa | Accepted | Androsace villosa | 3 | |
| Androsace villosa subsp. arachnoidea | Synonym | Androsace villosa var. arachnoidea | 1 | |
| Androsace vitaliana subsp. cinerea | Unchecked | 1 | ||
| Androsace wulfeniana | Accepted | Androsace wulfeniana | 1 | |
| Androsace yargongensis | Accepted | Androsace yargongensis | 1 | |
| Androsace zambalensis | Accepted | Androsace zambalensis | 1 | |
| Andryala integrifolia | Accepted | Andryala integrifolia | 1 | |
| Anemone alpina | Synonym | Pulsatilla alpina | 1 | |
| Anemone baldensis | Synonym | Anemone multifida | 1 | |
| Anemone canadensis | Synonym | Anemonastrum canadense | 1 | |
| Anemone coronaria | Accepted | Anemone coronaria | 1 | |
| Anemone halleri | Synonym | Pulsatilla halleri | 1 | |
| Anemone hepatica | Synonym | Hepatica nobilis | 1 | |
| Anemone multiceps | Accepted | Anemone multiceps | 1 | |
| Anemone narcissiflora | Accepted | Anemone narcissiflora | 1 | |
| Anemone narcissiflora subsp. sibirica | Synonym | Anemonastrum sibiricum | 1 | |
| Anemone nemorosa | Synonym | Anemone altaica | 2 | |
| Anemone parviflora | Accepted | Anemone parviflora | 1 | |
| Anemone patens | Synonym | Pulsatilla patens | 1 | |
| Anemone pulsatilla | Synonym | Pulsatilla vulgaris | 1 | |
| Anemone ranunculoides | Synonym | Anemonastrum richardsonii | 2 | |
| Anemone trifolia | Synonym | Anemonoides reflexa | 1 | |
| Anethum graveolens | Accepted | Anethum graveolens | 1 | |
| Angelica archangelica | Accepted | Angelica archangelica | 2 | |
| Angelica archangelica subsp. litoralis | Accepted | Angelica archangelica subsp. litoralis | 1 | |
| Angelica gmelinii | Accepted | Angelica gmelinii | 1 | |
| Angelica sylvestris | Accepted | Angelica sylvestris | 2 | |
| Aniba panurensis | Accepted | Aniba panurensis | 1 | |
| Anigozanthos | Accepted | Anigozanthos | 1 | |
| Anogramma leptophylla | Accepted | Anogramma leptophylla | 1 | |
| Antennaria alpina | Accepted | Antennaria alpina | 1 | |
| Antennaria alpina subsp. canescens | Synonym | Antennaria alpina | 1 | |
| Antennaria alpina subsp. porsildii | Unchecked | 2 | ||
| Antennaria carpatica | Accepted | Antennaria carpatica | 1 | |
| Antennaria carpatica | Accepted | Antennaria carpatica | 1 | |
| Antennaria dioica | Accepted | Antennaria dioica | 2 | |
| Antennaria friesiana | Accepted | Antennaria friesiana | 1 | |
| Antennaria media subsp. compacta | Synonym | Antennaria alpina | 1 | |
| Antennaria monocephala | Accepted | Antennaria monocephala | 1 | |
| Antennaria monocephala subsp. angustata | Accepted | Antennaria monocephala subsp. angustata | 1 | |
| Antennaria nordhageniana | Accepted | Antennaria nordhageniana | 1 | |
| Antennaria rosea | Accepted | Antennaria rosea | 2 | |
| Antennaria rosea subsp. pulvinata | Accepted | Antennaria rosea subsp. pulvinata | 1 | |
| Antennaria villifera | Synonym | Antennaria lanata | 1 | |
| Anthemis arvensis | Accepted | Anthemis arvensis | 2 | |
| Anthemis arvensis subsp. incrassata | Accepted | Anthemis arvensis subsp. incrassata | 1 | |
| Anthemis austriaca | Synonym | Cota austriaca | 1 | |
| Anthemis carpatica | Synonym | Anthemis cretica subsp. carpatica | 1 | |
| Anthemis cotula | Accepted | Anthemis cotula | 1 | |
| Anthemis cretica | Accepted | Anthemis cretica | 1 | |
| Anthemis cretica | Accepted | Anthemis cretica | 1 | |
| Anthemis cretica subsp. pyrethriformis | Accepted | Anthemis cretica subsp. pyrethriformis | 1 | |
| Anthemis gerardiana | Synonym | Anthemis cretica subsp. gerardiana | 1 | |
| Anthemis ruthenica | Accepted | Anthemis ruthenica | 2 | |
| Anthemis tinctoria subsp. tinctoria | Synonym | Cota tinctoria | 1 | |
| Anthemis triumfettii | Synonym | Cota triumfetti | 1 | |
| Anthericum liliago | Accepted | Anthericum liliago | 1 | |
| Anthericum ramosum | Accepted | Anthericum ramosum | 2 | |
| Anthoxanthum alpinum | Synonym | Anthoxanthum odoratum | 1 | |
| Anthoxanthum aristatum | Accepted | Anthoxanthum aristatum | 1 | |
| Anthoxanthum monticola subsp. orthanthum | Synonym | Anthoxanthum monticola | 1 | |
| Anthoxanthum nipponicum | Accepted | Anthoxanthum nipponicum | 1 | |
| Anthoxanthum odoratum | Accepted | Anthoxanthum odoratum | 1 | |
| Anthoxanthum odoratum subsp. odoratum | Synonym | Anthoxanthum odoratum | 1 | |
| Anthriscus caucalis | Accepted | Anthriscus caucalis | 1 | |
| Anthriscus cerefolium | Accepted | Anthriscus cerefolium | 1 | |
| Anthriscus nemorosa | Accepted | Anthriscus nemorosa | 1 | |
| Anthriscus nitida | Accepted | Anthriscus nitida | 1 | |
| Anthriscus sylvestris | Accepted | Anthriscus sylvestris | 2 | |
| Anthriscus sylvestris subsp. alpina | Synonym | Anthriscus sylvestris | 1 | |
| Anthyllis montana | Accepted | Anthyllis montana | 1 | |
| Anthyllis montana subsp. jacquinii | Accepted | Anthyllis montana subsp. jacquinii | 1 | |
| Anthyllis vulneraria | Accepted | Anthyllis vulneraria | 1 | |
| Anthyllis vulneraria | Accepted | Anthyllis vulneraria | 1 | |
| Anthyllis vulneraria subsp. alpestris | Accepted | Anthyllis vulneraria subsp. alpestris | 1 | |
| Anthyllis vulneraria subsp. alpestris | Accepted | Anthyllis vulneraria subsp. alpestris | 1 | |
| Anthyllis vulneraria subsp. carpatica | Accepted | Anthyllis vulneraria subsp. carpatica | 1 | |
| Anthyllis vulneraria subsp. forondae | Accepted | Anthyllis vulneraria subsp. forondae | 1 | |
| Anthyllis vulneraria subsp. lapponica | Accepted | Anthyllis vulneraria subsp. lapponica | 1 | |
| Anthyllis vulneraria subsp. polyphylla | Accepted | Anthyllis vulneraria subsp. polyphylla | 1 | |
| Anthyllis vulneraria subsp. rubriflora | Accepted | Anthyllis vulneraria subsp. rubriflora | 1 | |
| Anthyllis vulneraria subsp. vulnerarioides | Accepted | Anthyllis vulneraria subsp. vulnerarioides | 1 | |
| Anticlea elegans | Accepted | Anticlea elegans | 1 | |
| Antirrhinum latifolium | Accepted | Antirrhinum latifolium | 1 | |
| Antirrhinum majus | Accepted | Antirrhinum majus | 1 | |
| Apera interrupta | Accepted | Apera interrupta | 1 | |
| Apera spica-venti | Accepted | Apera spica-venti | 1 | |
| Aphanes arvensis | Accepted | Aphanes arvensis | 1 | |
| Aphanes australis | Accepted | Aphanes australis | 1 | |
| Aphanopetalum clematideum | Accepted | Aphanopetalum clematideum | 1 | |
| Aphelia cyperoides | Accepted | Aphelia cyperoides | 1 | |
| Aphloia theiformis | Accepted | Aphloia theiformis | 1 | |
| Aphyllanthes monspeliensis | Accepted | Aphyllanthes monspeliensis | 1 | |
| Apium inundatum | Accepted | Apium inundatum | 1 | |
| Apium nodiflorum | Accepted | Apium nodiflorum | 1 | |
| Apium repens | Accepted | Apium repens | 1 | |
| Apodanthes caseariae | Accepted | Apodanthes caseariae | 1 | |
| Apodytes clusiifolia | Accepted | Apodytes clusiifolia | 1 | |
| Aponogeton distachyos | Accepted | Aponogeton distachyos | 1 | |
| Aposeris foetida | Accepted | Aposeris foetida | 1 | |
| Aquilegia alpina | Accepted | Aquilegia alpina | 1 | |
| Aquilegia atrata | Accepted | Aquilegia atrata | 2 | |
| Aquilegia bertolonii | Accepted | Aquilegia bertolonii | 1 | |
| Aquilegia einseleana | Accepted | Aquilegia einseleana | 2 | |
| Aquilegia nigricans | Accepted | Aquilegia nigricans | 1 | |
| Aquilegia thalictrifolia | Synonym | Aquilegia chrysantha | 1 | |
| Aquilegia transsilvanica | Accepted | Aquilegia transsilvanica | 1 | |
| Aquilegia vestinae | Synonym | Aquilegia einseleana | 2 | |
| Aquilegia vulgaris | Accepted | Aquilegia vulgaris | 1 | |
| Arabidopsis arenosa | Accepted | Arabidopsis arenosa | 1 | |
| Arabidopsis arenosa subsp. borbasii | Accepted | Arabidopsis arenosa subsp. borbasii | 1 | |
| Arabidopsis halleri subsp. ovirensis | Accepted | Arabidopsis halleri subsp. ovirensis | 1 | |
| Arabidopsis neglecta | Accepted | Arabidopsis neglecta | 1 | |
| Arabidopsis thaliana | Accepted | Arabidopsis thaliana | 2 | |
| Arabis allionii | Accepted | Arabis allionii | 1 | |
| Arabis alpina | Accepted | Arabis alpina | 1 | |
| Arabis alpina subsp. alpina | Synonym | Arabis alpina | 1 | |
| Arabis auriculata | Synonym | Arabis nova | 2 | |
| Arabis bellidifolia subsp. bellidifolia | Unchecked | 1 | ||
| Arabis bellidifolia subsp. stellulata | Synonym | Arabis stellulata | 1 | |
| Arabis caerulea | Accepted | Arabis caerulea | 1 | |
| Arabis caucasica | Accepted | Arabis caucasica | 1 | |
| Arabis ciliata | Accepted | Arabis ciliata | 1 | |
| Arabis collina | Accepted | Arabis collina | 1 | |
| Arabis hirsuta | Accepted | Arabis hirsuta | 4 | |
| Arabis hirsuta subsp. pycnocarpa | Unchecked | 1 | ||
| Arabis kamchatica | Synonym | Arabidopsis lyrata subsp. kamchatica | 1 | |
| Arabis nova | Accepted | Arabis nova | 1 | |
| Arabis planisiliqua | Accepted | Arabis planisiliqua | 1 | |
| Arabis procurrens | Accepted | Arabis procurrens | 1 | |
| Arabis sagittata | Accepted | Arabis sagittata | 1 | |
| Arabis scabra | Accepted | Arabis scabra | 1 | |
| Arabis serpillifolia | Accepted | Arabis serpillifolia | 1 | |
| Arabis subcoriacea | Synonym | Arabis soyeri subsp. subcoriacea | 1 | |
| Arabis sudetica | Synonym | Arabis allionii | 1 | |
| Arabis turrita | Synonym | Pseudoturritis turrita | 1 | |
| Arabis verna | Accepted | Arabis verna | 1 | |
| Arabis vochinensis | Synonym | Arabis procurrens var. vochinensis | 1 | |
| Arbutus unedo | Accepted | Arbutus unedo | 2 | |
| Arceuthobium oxycedri | Accepted | Arceuthobium oxycedri | 1 | |
| Arctagrostis latifolia | Accepted | Arctagrostis latifolia | 2 | |
| Arctanthemum arcticum | Accepted | Arctanthemum arcticum | 1 | |
| Arctium lappa | Accepted | Arctium lappa | 2 | |
| Arctium minus | Accepted | Arctium minus | 1 | |
| Arctium minus subsp. minus | Synonym | Arctium minus | 1 | |
| Arctium nemorosum | Accepted | Arctium nemorosum | 1 | |
| Arctium tomentosum | Accepted | Arctium tomentosum | 2 | |
| Arctodupontia × scleroclada | Accepted | Arctodupontia × scleroclada | 1 | |
| Arctophila fulva | Accepted | Arctophila fulva | 1 | |
| Arctostaphylos alpina | Synonym | Arctostaphylos uva-ursi | 1 | |
| Arctostaphylos uva-ursi | Accepted | Arctostaphylos uva-ursi | 2 | |
| Aremonia agrimonoides | Accepted | Aremonia agrimonoides | 1 | |
| Arenaria aggregata | Accepted | Arenaria aggregata | 1 | |
| Arenaria biflora | Accepted | Arenaria biflora | 1 | |
| Arenaria capillaris | Synonym | Eremogone capillaris | 1 | |
| Arenaria ciliata subsp. multicaulis | Accepted | Arenaria ciliata subsp. multicaulis | 1 | |
| Arenaria cinerea | Accepted | Arenaria cinerea | 1 | |
| Arenaria grandiflora | Accepted | Arenaria grandiflora | 1 | |
| Arenaria humifusa | Accepted | Arenaria humifusa | 1 | |
| Arenaria huteri | Accepted | Arenaria huteri | 1 | |
| Arenaria leptoclados | Synonym | Arenaria serpyllifolia subsp. leptoclados | 1 | |
| Arenaria marschlinsii | Synonym | Arenaria serpyllifolia subsp. marschlinsii | 1 | |
| Arenaria norvegica | Accepted | Arenaria norvegica | 1 | |
| Arenaria pseudofrigida | Accepted | Arenaria pseudofrigida | 1 | |
| Arenaria purpurascens | Accepted | Arenaria purpurascens | 1 | |
| Arenaria serpyllifolia | Accepted | Arenaria serpyllifolia | 2 | |
| Argophyllum montanum | Accepted | Argophyllum montanum | 1 | |
| Argophyllum nitidum | Accepted | Argophyllum nitidum | 1 | |
| Argyrolobium zanonii | Accepted | Argyrolobium zanonii | 1 | |
| Aristida rufescens | Accepted | Aristida rufescens | 1 | |
| Aristolochia clematitis | Accepted | Aristolochia clematitis | 1 | |
| Aristolochia lutea | Accepted | Aristolochia lutea | 1 | |
| Aristolochia pallida | Accepted | Aristolochia pallida | 1 | |
| Aristolochia pistolochia | Accepted | Aristolochia pistolochia | 1 | |
| Aristolochia rotunda | Accepted | Aristolochia rotunda | 1 | |
| Armeria alpina | Accepted | Armeria alpina | 1 | |
| Armeria arenaria subsp. arenaria | Unchecked | 1 | ||
| Armeria arenaria subsp. bupleuroides | Synonym | Armeria arenaria | 1 | |
| Armeria arenaria subsp. praecox | Accepted | Armeria arenaria subsp. praecox | 1 | |
| Armeria maritima | Accepted | Armeria maritima | 1 | |
| Armeria maritima subsp. barcensis | Accepted | Armeria maritima subsp. barcensis | 1 | |
| Armeria maritima subsp. serpentini | Synonym | Armeria maritima subsp. halleri | 1 | |
| Armeria scabra | Accepted | Armeria scabra | 1 | |
| Armoracia rusticana | Accepted | Armoracia rusticana | 1 | |
| Arnica angustifolia subsp. alpina | Accepted | Arnica angustifolia subsp. alpina | 1 | |
| Arnica griscomii subsp. frigida | Accepted | Arnica griscomii subsp. frigida | 1 | |
| Arnica lessingii | Accepted | Arnica lessingii | 1 | |
| Arnica montana | Accepted | Arnica montana | 2 | |
| Arnica unalaschcensis | Accepted | Arnica unalaschcensis | 1 | |
| Arnoseris minima | Accepted | Arnoseris minima | 1 | |
| Arrhenatherum elatius | Accepted | Arrhenatherum elatius | 2 | |
| Artemisia absinthium | Accepted | Artemisia absinthium | 3 | |
| Artemisia alba | Accepted | Artemisia alba | 1 | |
| Artemisia annua | Accepted | Artemisia annua | 1 | |
| Artemisia arctica | Synonym | Artemisia richardsoniana | 1 | |
| Artemisia atrata | Accepted | Artemisia atrata | 1 | |
| Artemisia borealis | Unchecked | 2 | ||
| Artemisia borealis subsp. richardsoniana | Unchecked | 1 | ||
| Artemisia campestris | Accepted | Artemisia campestris | 1 | |
| Artemisia campestris | Accepted | Artemisia campestris | 2 | |
| Artemisia campestris subsp. alpina | Accepted | Artemisia campestris subsp. alpina | 1 | |
| Artemisia chamaemelifolia | Accepted | Artemisia chamaemelifolia | 1 | |
| Artemisia dracunculus | Accepted | Artemisia dracunculus | 1 | |
| Artemisia eriantha | Synonym | Artemisia umbelliformis subsp. eriantha | 1 | |
| Artemisia genipi | Accepted | Artemisia genipi | 1 | |
| Artemisia glacialis | Accepted | Artemisia glacialis | 1 | |
| Artemisia glomerata | Accepted | Artemisia glomerata | 1 | |
| Artemisia insipida | Accepted | Artemisia insipida | 1 | |
| Artemisia maritima | Synonym | Seriphidium caerulescens subsp. gallicum | 1 | |
| Artemisia nitida | Accepted | Artemisia nitida | 1 | |
| Artemisia nivalis | Accepted | Artemisia nivalis | 1 | |
| Artemisia norvegica | Accepted | Artemisia norvegica | 1 | |
| Artemisia pontica | Accepted | Artemisia pontica | 1 | |
| Artemisia tilesii | Accepted | Artemisia tilesii | 1 | |
| Artemisia umbelliformis | Accepted | Artemisia umbelliformis | 1 | |
| Artemisia vallesiaca | Synonym | Seriphidium vallesiacum | 1 | |
| Artemisia verlotiorum | Accepted | Artemisia verlotiorum | 1 | |
| Artemisia vulgaris | Accepted | Artemisia vulgaris | 2 | |
| Arum cylindraceum | Accepted | Arum cylindraceum | 1 | |
| Arum italicum | Accepted | Arum italicum | 1 | |
| Arum maculatum | Accepted | Arum maculatum | 1 | |
| Arum orientale | Accepted | Arum orientale | 1 | |
| Aruncus dioicus | Accepted | Aruncus dioicus | 2 | |
| Arundinaria | Accepted | Arundinaria | 1 | |
| Arundinaria humbertii | Synonym | Oldeania humbertii | 1 | |
| Arundinella nepalensis | Accepted | Arundinella nepalensis | 1 | |
| Arundo donax | Accepted | Arundo donax | 1 | |
| Asarum europaeum | Accepted | Asarum europaeum | 3 | |
| Ascarina rubricaulis | Accepted | Ascarina rubricaulis | 1 | |
| Ascarina solmsiana | Accepted | Ascarina solmsiana | 1 | |
| Asclepias syriaca | Accepted | Asclepias syriaca | 1 | |
| Asparagus acutifolius | Accepted | Asparagus acutifolius | 1 | |
| Asparagus officinalis | Accepted | Asparagus officinalis | 2 | |
| Asparagus tenuifolius | Accepted | Asparagus tenuifolius | 1 | |
| Asperugo procumbens | Accepted | Asperugo procumbens | 1 | |
| Asperula aristata | Synonym | Cynanchica aristata | 1 | |
| Asperula aristata subsp. oreophila | Synonym | Cynanchica aristata subsp. scabra | 1 | |
| Asperula arvensis | Accepted | Asperula arvensis | 1 | |
| Asperula capitata | Synonym | Asperula glomerata subsp. glomerata | 1 | |
| Asperula cynanchica | Synonym | Cynanchica pyrenaica subsp. cynanchica | 1 | |
| Asperula hexaphylla | Synonym | Hexaphylla cretacea | 1 | |
| Asperula neilreichii | Synonym | Cynanchica neilreichii | 1 | |
| Asperula purpurea | Synonym | Thliphthisa purpurea | 1 | |
| Asperula rupicola | Synonym | Cynanchica rupicola | 1 | |
| Asperula taurina | Accepted | Asperula taurina | 1 | |
| Asperula taurina subsp. leucanthera | Synonym | Asperula taurina | 1 | |
| Asperula tinctoria | Accepted | Asperula tinctoria | 2 | |
| Asperula tinctoria subsp. hungarorum | Accepted | Asperula tinctoria subsp. hungarorum | 1 | |
| Asphodelus albus | Accepted | Asphodelus albus | 1 | |
| Asphodelus macrocarpus | Accepted | Asphodelus macrocarpus | 1 | |
| Aspidosperma marcgravianum | Synonym | Aspidosperma excelsum | 1 | |
| Asplenium adiantum-nigrum | Accepted | Asplenium adiantum-nigrum | 2 | |
| Asplenium × adulterinum | Accepted | Asplenium × adulterinum | 1 | |
| Asplenium adulterinum | Accepted | Asplenium adulterinum | 1 | |
| Asplenium alternifolium | Unchecked | 1 | ||
| Asplenium billotii | Synonym | Asplenium obovatum subsp. billotii | 1 | |
| Asplenium cuneifolium | Accepted | Asplenium cuneifolium | 1 | |
| Asplenium fissum | Accepted | Asplenium fissum | 1 | |
| Asplenium fontanum | Accepted | Asplenium fontanum | 1 | |
| Asplenium foresiense | Unchecked | 1 | ||
| Asplenium jahandiezii | Accepted | Asplenium jahandiezii | 1 | |
| Asplenium lepidum | Accepted | Asplenium lepidum | 1 | |
| Asplenium marinum | Accepted | Asplenium marinum | 1 | |
| Asplenium onopteris | Accepted | Asplenium onopteris | 1 | |
| Asplenium petrarchae | Accepted | Asplenium petrarchae | 1 | |
| Asplenium ruta-muraria | Accepted | Asplenium ruta-muraria | 1 | |
| Asplenium ruta-muraria | Accepted | Asplenium ruta-muraria | 1 | |
| Asplenium scolopendrium | Accepted | Asplenium scolopendrium | 3 | |
| Asplenium seelosii | Accepted | Asplenium seelosii | 1 | |
| Asplenium septentrionale | Accepted | Asplenium septentrionale | 2 | |
| Asplenium trichomanes | Accepted | Asplenium trichomanes | 1 | |
| Asplenium trichomanes | Accepted | Asplenium trichomanes | 2 | |
| Asplenium trichomanes subsp. inexpectans | Unchecked | 1 | ||
| Asplenium trichomanes subsp. pachyrachis | Accepted | Asplenium trichomanes subsp. pachyrachis | 1 | |
| Asplenium trichomanes subsp. quadrivalens | Accepted | Asplenium trichomanes subsp. quadrivalens | 1 | |
| Asplenium viride | Accepted | Asplenium viride | 3 | |
| Astelia neocaledonica | Accepted | Astelia neocaledonica | 1 | |
| Aster alpinus | Accepted | Aster alpinus | 1 | |
| Aster amellus | Accepted | Aster amellus | 1 | |
| Aster bellidiastrum | Accepted | Aster bellidiastrum | 1 | |
| Aster lanceolatus | Synonym | Symphyotrichum lanceolatum | 1 | |
| Aster linosyris | Synonym | Galatella linosyris subsp. linosyris | 2 | |
| Aster novae-angliae | Synonym | Symphyotrichum novae-angliae | 1 | |
| Aster novi-belgii | Synonym | Symphyotrichum novi-belgii | 2 | |
| Asterolinon linum-stellatum | Synonym | Lysimachia linum-stellatum | 1 | |
| Aster sedifolius | Synonym | Galatella sedifolia subsp. sedifolia | 1 | |
| Aster squamatus | Synonym | Symphyotrichum subulatum var. squamatum | 1 | |
| Aster tripolium | Synonym | Symphyotrichum tenuifolium | 1 | |
| Astragalus aboriginum | Accepted | Astragalus aboriginum | 1 | |
| Astragalus alopecurus | Accepted | Astragalus alopecurus | 1 | |
| Astragalus alpinus | Accepted | Astragalus alpinus | 2 | |
| Astragalus alpinus var. arcticus | Synonym | Astragalus norvegicus | 1 | |
| Astragalus australis | Accepted | Astragalus australis | 1 | |
| Astragalus austriacus | Accepted | Astragalus austriacus | 1 | |
| Astragalus carniolicus | Synonym | Astragalus vesicarius subsp. carniolicus | 1 | |
| Astragalus cicer | Accepted | Astragalus cicer | 1 | |
| Astragalus danicus | Accepted | Astragalus danicus | 1 | |
| Astragalus depressus | Accepted | Astragalus depressus | 1 | |
| Astragalus exscapus | Accepted | Astragalus exscapus | 1 | |
| Astragalus frigidus | Accepted | Astragalus frigidus | 1 | |
| Astragalus glycyphyllos | Accepted | Astragalus glycyphyllos | 2 | |
| Astragalus hamosus | Accepted | Astragalus hamosus | 1 | |
| Astragalus hypoglottis | Accepted | Astragalus hypoglottis | 1 | |
| Astragalus incanus | Accepted | Astragalus incanus | 1 | |
| Astragalus leontinus | Accepted | Astragalus leontinus | 1 | |
| Astragalus monspessulanus | Accepted | Astragalus monspessulanus | 1 | |
| Astragalus norvegicus | Accepted | Astragalus norvegicus | 1 | |
| Astragalus nutzotinensis | Accepted | Astragalus nutzotinensis | 1 | |
| Astragalus onobrychis | Accepted | Astragalus onobrychis | 1 | |
| Astragalus penduliflorus | Accepted | Astragalus penduliflorus | 1 | |
| Astragalus peterfii | Accepted | Astragalus peterfii | 1 | |
| Astragalus pseudopurpureus | Accepted | Astragalus pseudopurpureus | 1 | |
| Astragalus richardsonii | Synonym | Astragalus hallii var. hallii | 1 | |
| Astragalus roemeri | Accepted | Astragalus roemeri | 1 | |
| Astragalus sempervirens subsp. alpinus | Synonym | Astragalus sempervirens | 1 | |
| Astragalus sempervirens subsp. sempervirens | Synonym | Astragalus sempervirens | 1 | |
| Astragalus stella | Accepted | Astragalus stella | 1 | |
| Astragalus tenellus | Accepted | Astragalus tenellus | 1 | |
| Astragalus umbellatus | Accepted | Astragalus umbellatus | 1 | |
| Astragalus vesicarius | Accepted | Astragalus vesicarius | 1 | |
| Astragalus vesicarius subsp. pastellianus | Accepted | Astragalus vesicarius subsp. pastellianus | 1 | |
| Astrantia bavarica | Accepted | Astrantia bavarica | 1 | |
| Astrantia carniolica | Accepted | Astrantia carniolica | 1 | |
| Astrantia major | Accepted | Astrantia major | 1 | |
| Astrantia major | Accepted | Astrantia major | 1 | |
| Astrantia major subsp. involucrata | Synonym | Astrantia major | 1 | |
| Astrantia minor | Accepted | Astrantia minor | 1 | |
| Astrocaryum sciophilum | Accepted | Astrocaryum sciophilum | 1 | |
| Asystasia gangetica subsp. micrantha | Accepted | Asystasia gangetica subsp. micrantha | 1 | |
| Athamanta cretensis | Accepted | Athamanta cretensis | 2 | |
| Athamanta turbith | Accepted | Athamanta turbith | 2 | |
| Athamanta turbith subsp. hungarica | Accepted | Athamanta turbith subsp. hungarica | 1 | |
| Athyrium distentifolium | Accepted | Athyrium distentifolium | 1 | |
| Athyrium distentifolium | Accepted | Athyrium distentifolium | 1 | |
| Athyrium filix-femina | Accepted | Athyrium filix-femina | 2 | |
| Atocion rupestre | Synonym | Silene rupestris | 1 | |
| Atractylis humilis | Accepted | Atractylis humilis | 1 | |
| Atriplex glabriuscula | Accepted | Atriplex glabriuscula | 1 | |
| Atriplex hortensis | Accepted | Atriplex hortensis | 1 | |
| Atriplex laciniata | Accepted | Atriplex laciniata | 1 | |
| Atriplex lapponica | Synonym | Atriplex nudicaulis | 1 | |
| Atriplex littoralis | Accepted | Atriplex littoralis | 1 | |
| Atriplex longipes subsp. praecox | Synonym | Atriplex nudicaulis | 1 | |
| Atriplex oblongifolia | Accepted | Atriplex oblongifolia | 1 | |
| Atriplex patula | Accepted | Atriplex patula | 1 | |
| Atriplex prostrata | Accepted | Atriplex prostrata | 2 | |
| Atriplex sagittata | Accepted | Atriplex sagittata | 1 | |
| Atriplex tatarica | Accepted | Atriplex tatarica | 1 | |
| Atropa belladonna | Accepted | Atropa belladonna | 1 | |
| Aubrieta deltoidea | Accepted | Aubrieta deltoidea | 1 | |
| Aurinia petraea | Accepted | Aurinia petraea | 1 | |
| Autranella congolensis | Accepted | Autranella congolensis | 1 | |
| Avena barbata | Accepted | Avena barbata | 1 | |
| Avena fatua | Accepted | Avena fatua | 2 | |
| Avena sativa | Accepted | Avena sativa | 1 | |
| Avena sterilis | Accepted | Avena sterilis | 1 | |
| Avenella flexuosa | Accepted | Avenella flexuosa | 3 | |
| Avenula pubescens | Accepted | Avenula pubescens | 1 | |
| Axonopus ramosus | Accepted | Axonopus ramosus | 1 | |
| Azima | Accepted | Azima | 1 | |
| Azolla filiculoides | Accepted | Azolla filiculoides | 1 | |
| Bagassa guianensis | Accepted | Bagassa guianensis | 1 | |
| Balanops oliviformis | Accepted | Balanops oliviformis | 1 | |
| Baldellia ranunculoides | Accepted | Baldellia ranunculoides | 2 | |
| Balfourodendron riedelianum | Accepted | Balfourodendron riedelianum | 1 | |
| Ballota frutescens | Synonym | Acanthoprasium frutescens | 1 | |
| Ballota nigra | Accepted | Ballota nigra | 1 | |
| Ballota nigra subsp. meridionalis | Synonym | Ballota nigra | 2 | |
| Barbarea bracteosa | Accepted | Barbarea bracteosa | 1 | |
| Barbarea intermedia | Accepted | Barbarea intermedia | 1 | |
| Barbarea orthoceras | Accepted | Barbarea orthoceras | 1 | |
| Barbarea stricta | Accepted | Barbarea stricta | 1 | |
| Barbarea verna | Accepted | Barbarea verna | 1 | |
| Barbarea vulgaris | Accepted | Barbarea vulgaris | 2 | |
| Barbarea vulgaris var. arcuata | Synonym | Barbarea vulgaris | 1 | |
| Barbeya oleoides | Accepted | Barbeya oleoides | 1 | |
| Bartsia | Accepted | Bartsia | 1 | |
| Bartsia alpina | Accepted | Bartsia alpina | 1 | |
| Bassia prostrata | Accepted | Bassia prostrata | 1 | |
| Bassia scoparia | Accepted | Bassia scoparia | 1 | |
| Bellardia trixago | Accepted | Bellardia trixago | 1 | |
| Bellevalia romana | Accepted | Bellevalia romana | 1 | |
| Bellis perennis | Accepted | Bellis perennis | 2 | |
| Bellis sylvestris | Accepted | Bellis sylvestris | 1 | |
| Berardia subacaulis | Synonym | Berardia lanuginosa | 1 | |
| Berberis thunbergii | Accepted | Berberis thunbergii | 1 | |
| Berberis vulgaris | Accepted | Berberis vulgaris | 1 | |
| Bergenia crassifolia | Accepted | Bergenia crassifolia | 1 | |
| Berteroa incana | Accepted | Berteroa incana | 2 | |
| Berula erecta | Accepted | Berula erecta | 2 | |
| Berzelia commutata | Accepted | Berzelia commutata | 1 | |
| Betula carpatica | Synonym | Betula pubescens var. pubescens | 1 | |
| Betula fruticosa | Accepted | Betula fruticosa | 1 | |
| Betula humilis | Accepted | Betula humilis | 1 | |
| Betula nana | Accepted | Betula nana | 1 | |
| Betula nana subsp. exilis | Synonym | Betula glandulosa | 1 | |
| Betula nana subsp. nana | Synonym | Betula nana | 1 | |
| Betula nana subsp. tundrarum | Synonym | Betula nana | 1 | |
| Betula neoalaskana | Synonym | Betula pendula subsp. mandshurica | 1 | |
| Betula pendula | Accepted | Betula pendula | 1 | |
| Betula pubescens | Accepted | Betula pubescens | 2 | |
| Bidens bipinnata | Accepted | Bidens bipinnata | 1 | |
| Bidens cernua | Accepted | Bidens cernua | 2 | |
| Bidens connata | Accepted | Bidens connata | 1 | |
| Bidens frondosa | Accepted | Bidens frondosa | 1 | |
| Bidens radiata | Accepted | Bidens radiata | 1 | |
| Bidens tripartita | Accepted | Bidens tripartita | 2 | |
| Bifora radians | Accepted | Bifora radians | 1 | |
| Bifora testiculata | Accepted | Bifora testiculata | 1 | |
| Biscutella brevicaulis | Accepted | Biscutella brevicaulis | 1 | |
| Biscutella cichoriifolia | Accepted | Biscutella cichoriifolia | 1 | |
| Biscutella coronopifolia | Accepted | Biscutella coronopifolia | 1 | |
| Biscutella laevigata subsp. austriaca | Accepted | Biscutella laevigata subsp. austriaca | 1 | |
| Biscutella laevigata subsp. laevigata | Synonym | Biscutella laevigata | 1 | |
| Biscutella laevigata subsp. lucida | Synonym | Biscutella laevigata | 1 | |
| Biscutella valentina subsp. valentina | Synonym | Biscutella valentina | 1 | |
| Bistorta major subsp. plumosa | Synonym | Persicaria bistorta | 1 | |
| Bistorta officinalis | Synonym | Persicaria bistorta | 1 | |
| Bistorta vivipara | Synonym | Persicaria vivipara | 1 | |
| Bituminaria bituminosa | Accepted | Bituminaria bituminosa | 1 | |
| Bixa orellana | Accepted | Bixa orellana | 1 | |
| Blackstonia acuminata | Accepted | Blackstonia acuminata | 1 | |
| Blackstonia perfoliata | Accepted | Blackstonia perfoliata | 1 | |
| Blandfordia cunninghamii | Accepted | Blandfordia cunninghamii | 1 | |
| Blechnum spicant | Accepted | Blechnum spicant | 3 | |
| Blitum capitatum | Synonym | Chenopodium capitatum | 1 | |
| Blitum virgatum | Synonym | Chenopodium foliosum | 1 | |
| Blysmopsis rufa | Synonym | Blysmus rufus | 1 | |
| Blysmus compressus | Accepted | Blysmus compressus | 1 | |
| Bocoa prouacensis | Accepted | Bocoa prouacensis | 1 | |
| Boechera holboellii | Accepted | Boechera holboellii | 1 | |
| Bolboschoenus maritimus | Accepted | Bolboschoenus maritimus | 1 | |
| Bonafousia undulata | Synonym | Tabernaemontana undulata | 1 | |
| Borago officinalis | Accepted | Borago officinalis | 1 | |
| Borderea pyrenaica | Synonym | Dioscorea pyrenaica | 1 | |
| Bothriochloa ischaemum | Accepted | Bothriochloa ischaemum | 1 | |
| Botrychium boreale | Accepted | Botrychium boreale | 1 | |
| Botrychium lanceolatum | Accepted | Botrychium lanceolatum | 2 | |
| Botrychium lunaria | Accepted | Botrychium lunaria | 3 | |
| Botrychium multifidum | Accepted | Botrychium multifidum | 1 | |
| Botrychium simplex | Accepted | Botrychium simplex | 2 | |
| Botrychium virginianum | Accepted | Botrychium virginianum | 1 | |
| Botrypus virginianus | Synonym | Botrychium virginianum | 1 | |
| Brachypodium distachyon | Accepted | Brachypodium distachyon | 1 | |
| Brachypodium phoenicoides | Accepted | Brachypodium phoenicoides | 1 | |
| Brachypodium pinnatum | Accepted | Brachypodium pinnatum | 2 | |
| Brachypodium retusum | Accepted | Brachypodium retusum | 1 | |
| Brachypodium rupestre | Synonym | Brachypodium pinnatum | 1 | |
| Brachypodium sylvaticum | Accepted | Brachypodium sylvaticum | 1 | |
| Brassica glabrescens | Synonym | Brassica repanda subsp. glabrescens | 1 | |
| Brassica juncea | Accepted | Brassica juncea | 1 | |
| Brassica napus subsp. oleifera | Synonym | Brassica napus | 1 | |
| Brassica nigra | Accepted | Brassica nigra | 1 | |
| Brassica oleracea | Accepted | Brassica oleracea | 1 | |
| Brassica rapa | Accepted | Brassica rapa | 1 | |
| Brassica rapa subsp. campestris | Synonym | Brassica rapa | 1 | |
| Brassica repanda subsp. repanda | Synonym | Brassica repanda | 1 | |
| Brassica repanda subsp. saxatilis | Accepted | Brassica repanda subsp. saxatilis | 1 | |
| Brassica saxatilis | Synonym | Brassica repanda subsp. saxatilis | 1 | |
| Braya alpina | Accepted | Braya alpina | 1 | |
| Braya glabella subsp. purpurascens | Synonym | Braya purpurascens | 1 | |
| Braya humilis | Accepted | Braya humilis | 1 | |
| Braya linearis | Accepted | Braya linearis | 2 | |
| Briza maxima | Accepted | Briza maxima | 2 | |
| Briza media | Accepted | Briza media | 2 | |
| Bromelia agavifolia | Accepted | Bromelia agavifolia | 1 | |
| Bromelia plumieri | Synonym | Bromelia karatas | 1 | |
| Bromopsis pumpelliana subsp. arctica | Synonym | Bromus pumpellianus | 1 | |
| Bromus arvensis | Accepted | Bromus arvensis | 2 | |
| Bromus benekenii | Accepted | Bromus benekenii | 1 | |
| Bromus catharticus | Accepted | Bromus catharticus | 1 | |
| Bromus commutatus | Accepted | Bromus commutatus | 1 | |
| Bromus diandrus | Accepted | Bromus diandrus | 1 | |
| Bromus erectus subsp. condensatus | Synonym | Bromus erectus | 2 | |
| Bromus erectus subsp. erectus | Unchecked | 1 | ||
| Bromus erectus subsp. transylvanicus | Synonym | Bromus erectus | 1 | |
| Bromus hordeaceus | Accepted | Bromus hordeaceus | 3 | |
| Bromus inermis | Accepted | Bromus inermis | 2 | |
| Bromus japonicus | Accepted | Bromus japonicus | 1 | |
| Bromus madritensis | Accepted | Bromus madritensis | 1 | |
| Bromus racemosus | Accepted | Bromus racemosus | 2 | |
| Bromus ramosus | Accepted | Bromus ramosus | 2 | |
| Bromus rigidus | Accepted | Bromus rigidus | 1 | |
| Bromus rubens | Accepted | Bromus rubens | 1 | |
| Bromus secalinus | Accepted | Bromus secalinus | 2 | |
| Bromus squarrosus | Accepted | Bromus squarrosus | 1 | |
| Bromus sterilis | Accepted | Bromus sterilis | 1 | |
| Bromus tectorum | Accepted | Bromus tectorum | 2 | |
| Brosimum glaziovii | Accepted | Brosimum glaziovii | 1 | |
| Brosimum guianense | Accepted | Brosimum guianense | 1 | |
| Broussonetia papyrifera | Accepted | Broussonetia papyrifera | 1 | |
| Bryonia dioica | Unchecked | 1 | ||
| Buchenavia guianensis | Synonym | Terminalia aubletii | 1 | |
| Buchenavia kleinii | Synonym | Terminalia kleinii | 1 | |
| Buddleja davidii | Accepted | Buddleja davidii | 1 | |
| Bufonia paniculata | Accepted | Bufonia paniculata | 1 | |
| Buglossoides arvensis | Accepted | Buglossoides arvensis | 2 | |
| Buglossoides arvensis subsp. gasparrinii | Synonym | Buglossoides incrassata | 1 | |
| Buglossoides arvensis subsp. permixta | Synonym | Buglossoides incrassata subsp. permixta | 1 | |
| Buglossoides purpurocaerulea | Synonym | Aegonychon purpurocaeruleum | 1 | |
| Bulbocodium vernum | Synonym | Colchicum bulbocodium | 1 | |
| Bunias erucago | Accepted | Bunias erucago | 1 | |
| Bunias orientalis | Accepted | Bunias orientalis | 1 | |
| Bunium bulbocastanum | Accepted | Bunium bulbocastanum | 1 | |
| Buphthalmum salicifolium | Accepted | Buphthalmum salicifolium | 1 | |
| Bupleurum arcticum | Synonym | Bupleurum americanum | 1 | |
| Bupleurum baldense | Accepted | Bupleurum baldense | 1 | |
| Bupleurum diversifolium | Synonym | Bupleurum falcatum subsp. cernuum | 1 | |
| Bupleurum falcatum subsp. cernuum | Accepted | Bupleurum falcatum subsp. cernuum | 1 | |
| Bupleurum falcatum subsp. falcatum | Unchecked | 1 | ||
| Bupleurum fruticosum | Accepted | Bupleurum fruticosum | 1 | |
| Bupleurum longifolium | Accepted | Bupleurum longifolium | 1 | |
| Bupleurum petraeum | Accepted | Bupleurum petraeum | 1 | |
| Bupleurum praealtum | Accepted | Bupleurum praealtum | 1 | |
| Bupleurum ranunculoides | Accepted | Bupleurum ranunculoides | 2 | |
| Bupleurum ranunculoides subsp. caricinum | Unchecked | 1 | ||
| Bupleurum ranunculoides subsp. ranunculoides | Unchecked | 1 | ||
| Bupleurum rigidum | Accepted | Bupleurum rigidum | 1 | |
| Bupleurum rotundifolium | Accepted | Bupleurum rotundifolium | 1 | |
| Bupleurum stellatum | Accepted | Bupleurum stellatum | 1 | |
| Bupleurum tenuissimum | Accepted | Bupleurum tenuissimum | 1 | |
| Bupleurum veronense | Accepted | Bupleurum veronense | 1 | |
| Burckella macropoda | Accepted | Burckella macropoda | 1 | |
| Butomus umbellatus | Accepted | Butomus umbellatus | 2 | |
| Buxus sempervirens | Accepted | Buxus sempervirens | 1 | |
| Byrsonima laevigata | Accepted | Byrsonima laevigata | 1 | |
| Cabralea canjerana | Accepted | Cabralea canjerana | 4 | |
| Cachrys trifida | Synonym | Prangos trifida | 1 | |
| Cakile maritima | Accepted | Cakile maritima | 1 | |
| Calamagrostis arundinacea | Accepted | Calamagrostis arundinacea | 3 | |
| Calamagrostis canadensis | Accepted | Calamagrostis canadensis | 1 | |
| Calamagrostis canescens | Accepted | Calamagrostis canescens | 2 | |
| Calamagrostis chalybaea | Accepted | Calamagrostis chalybaea | 1 | |
| Calamagrostis deschampsioides | Accepted | Calamagrostis deschampsioides | 1 | |
| Calamagrostis epigejos | Accepted | Calamagrostis epigejos | 2 | |
| Calamagrostis lapponica | Accepted | Calamagrostis lapponica | 1 | |
| Calamagrostis neglecta | Synonym | Calamagrostis stricta | 2 | |
| Calamagrostis neglecta subsp. groenlandica | Synonym | Calamagrostis stricta | 1 | |
| Calamagrostis neglecta subsp. neglecta | Synonym | Calamagrostis stricta | 1 | |
| Calamagrostis phragmitoides | Synonym | Calamagrostis purpurea | 1 | |
| Calamagrostis pseudophragmites | Accepted | Calamagrostis pseudophragmites | 1 | |
| Calamagrostis purpurascens | Accepted | Calamagrostis purpurascens | 1 | |
| Calamagrostis purpurea | Accepted | Calamagrostis purpurea | 2 | |
| Calamagrostis varia | Accepted | Calamagrostis varia | 2 | |
| Calamagrostis villosa | Accepted | Calamagrostis villosa | 1 | |
| Calamintha ascendens | Synonym | Clinopodium menthifolium subsp. ascendens | 1 | |
| Calamintha grandiflora | Synonym | Clinopodium carolinianum | 1 | |
| Calamintha menthifolia | Synonym | Clinopodium menthifolium | 1 | |
| Calamintha nepeta | Synonym | Clinopodium nepeta | 1 | |
| Calamintha nepetoides | Synonym | Clinopodium nepeta subsp. nepeta | 1 | |
| Calceolaria biflora | Accepted | Calceolaria biflora | 1 | |
| Calceolaria polyrhiza | Accepted | Calceolaria polyrhiza | 1 | |
| Calendula arvensis | Accepted | Calendula arvensis | 1 | |
| Calendula officinalis | Accepted | Calendula officinalis | 1 | |
| Calepina irregularis | Accepted | Calepina irregularis | 1 | |
| Calicotome spinosa | Accepted | Calicotome spinosa | 1 | |
| Calla palustris | Accepted | Calla palustris | 1 | |
| Callianthemum anemonoides | Accepted | Callianthemum anemonoides | 1 | |
| Callianthemum coriandrifolium | Accepted | Callianthemum coriandrifolium | 2 | |
| Callianthemum kernerianum | Accepted | Callianthemum kernerianum | 1 | |
| Callitriche cophocarpa | Accepted | Callitriche cophocarpa | 2 | |
| Callitriche hamulata | Accepted | Callitriche hamulata | 1 | |
| Callitriche hermaphroditica | Accepted | Callitriche hermaphroditica | 1 | |
| Callitriche palustris | Accepted | Callitriche palustris | 2 | |
| Callitriche platycarpa | Accepted | Callitriche platycarpa | 1 | |
| Calluna vulgaris | Accepted | Calluna vulgaris | 2 | |
| Calophyllum brasiliense | Accepted | Calophyllum brasiliense | 1 | |
| Caltha arctica | Synonym | Caltha palustris | 1 | |
| Caltha leptosepala | Accepted | Caltha leptosepala | 1 | |
| Caltha palustris | Accepted | Caltha palustris | 4 | |
| Calycanthus occidentalis | Accepted | Calycanthus occidentalis | 1 | |
| Calyptranthes concinna | Synonym | Myrcia glomerata | 1 | |
| Calyptranthes lanceolata | Synonym | Myrcia lonchophylla | 1 | |
| Calyptranthes speciosa | Synonym | Myrcia neospeciosa | 1 | |
| Calystegia sepium | Accepted | Calystegia sepium | 2 | |
| Calystegia silvatica | Accepted | Calystegia silvatica | 1 | |
| Calystegia soldanella | Accepted | Calystegia soldanella | 1 | |
| Camelina microcarpa | Accepted | Camelina microcarpa | 1 | |
| Camelina sativa | Accepted | Camelina sativa | 1 | |
| Campanula abietina | Synonym | Campanula patula subsp. abietina | 1 | |
| Campanula adsurgens | Synonym | Campanula arvatica subsp. adsurgens | 1 | |
| Campanula alaskana | Accepted | Campanula alaskana | 1 | |
| Campanula albanica | Accepted | Campanula albanica | 2 | |
| Campanula albicans | Synonym | Campanula petraea | 1 | |
| Campanula alpestris | Accepted | Campanula alpestris | 1 | |
| Campanula alpina | Accepted | Campanula alpina | 1 | |
| Campanula andorrana | Synonym | Campanula jaubertiana | 2 | |
| Campanula arvatica | Accepted | Campanula arvatica | 1 | |
| Campanula barbata | Accepted | Campanula barbata | 2 | |
| Campanula baumgartenii | Accepted | Campanula baumgartenii | 1 | |
| Campanula bertolae | Accepted | Campanula bertolae | 2 | |
| Campanula bohemica | Accepted | Campanula bohemica | 1 | |
| Campanula bononiensis | Accepted | Campanula bononiensis | 2 | |
| Campanula caespitosa | Accepted | Campanula caespitosa | 2 | |
| Campanula cantabrica | Accepted | Campanula cantabrica | 1 | |
| Campanula carnica subsp. carnica | Accepted | Campanula carnica subsp. carnica | 1 | |
| Campanula carnica subsp. puberula | Accepted | Campanula carnica subsp. puberula | 1 | |
| Campanula carpatica | Accepted | Campanula carpatica | 2 | |
| Campanula cenisia | Accepted | Campanula cenisia | 1 | |
| Campanula cervicaria | Accepted | Campanula cervicaria | 1 | |
| Campanula cochleariifolia | Accepted | Campanula cochleariifolia | 8 | |
| Campanula crassipes | Accepted | Campanula crassipes | 1 | |
| Campanula elatinoides | Accepted | Campanula elatinoides | 1 | |
| Campanula erinus | Accepted | Campanula erinus | 1 | |
| Campanula excisa | Accepted | Campanula excisa | 1 | |
| Campanula fragilis | Accepted | Campanula fragilis | 1 | |
| Campanula fragilis | Accepted | Campanula fragilis | 2 | |
| Campanula fritschii | Accepted | Campanula fritschii | 1 | |
| Campanula fritschii | Accepted | Campanula fritschii | 1 | |
| Campanula gelida | Synonym | Campanula bohemica subsp. gelida | 1 | |
| Campanula glomerata | Accepted | Campanula glomerata | 2 | |
| Campanula glomerata subsp. cervicarioides | Accepted | Campanula glomerata subsp. cervicarioides | 1 | |
| Campanula glomerata subsp. farinosa | Accepted | Campanula glomerata subsp. farinosa | 1 | |
| Campanula glomerata subsp. glomerata | Accepted | Campanula glomerata subsp. glomerata | 1 | |
| Campanula gracillima | Accepted | Campanula gracillima | 1 | |
| Campanula grossekii | Accepted | Campanula grossekii | 1 | |
| Campanula hercegovina | Accepted | Campanula hercegovina | 1 | |
| Campanula herminii | Accepted | Campanula herminii | 1 | |
| Campanula hispanica | Accepted | Campanula hispanica | 1 | |
| Campanula isophylla | Accepted | Campanula isophylla | 1 | |
| Campanula jaubertiana | Accepted | Campanula jaubertiana | 3 | |
| Campanula jaubertiana | Accepted | Campanula jaubertiana | 3 | |
| Campanula lasiocarpa | Accepted | Campanula lasiocarpa | 1 | |
| Campanula latifolia | Accepted | Campanula latifolia | 3 | |
| Campanula latifolia var. macrantha | Synonym | Campanula latifolia | 1 | |
| Campanula lingulata | Accepted | Campanula lingulata | 1 | |
| Campanula macrorhiza | Accepted | Campanula macrorhiza | 1 | |
| Campanula marchesettii | Accepted | Campanula marchesettii | 1 | |
| Campanula martinii | Unchecked | 2 | ||
| Campanula medium | Accepted | Campanula medium | 1 | |
| Campanula micrantha | Accepted | Campanula micrantha | 2 | |
| Campanula morettiana | Accepted | Campanula morettiana | 1 | |
| Campanula patula subsp. costae | Synonym | Campanula patula | 1 | |
| Campanula patula subsp. patula | Accepted | Campanula patula subsp. patula | 1 | |
| Campanula persicifolia | Accepted | Campanula persicifolia | 3 | |
| Campanula petraea | Accepted | Campanula petraea | 1 | |
| Campanula praesignis | Accepted | Campanula praesignis | 1 | |
| Campanula precatoria | Accepted | Campanula precatoria | 1 | |
| Campanula pseudostenocodon | Accepted | Campanula pseudostenocodon | 1 | |
| Campanula pulla | Accepted | Campanula pulla | 1 | |
| Campanula pyramidalis | Accepted | Campanula pyramidalis | 1 | |
| Campanula rainerii | Accepted | Campanula rainerii | 1 | |
| Campanula rapunculoides | Accepted | Campanula rapunculoides | 2 | |
| Campanula rapunculus | Accepted | Campanula rapunculus | 1 | |
| Campanula rhomboidalis | Accepted | Campanula rhomboidalis | 1 | |
| Campanula romanica | Accepted | Campanula romanica | 1 | |
| Campanula rotundifolia | Accepted | Campanula rotundifolia | 7 | |
| Campanula rotundifolia | Accepted | Campanula rotundifolia | 1 | |
| Campanula rotundifolia subsp. polymorpha | Synonym | Campanula tatrae | 2 | |
| Campanula rotundifolia subsp. sudetica | Synonym | Campanula tatrae subsp. sudetica | 1 | |
| Campanula sabatia | Accepted | Campanula sabatia | 1 | |
| Campanula scheuchzeri | Accepted | Campanula scheuchzeri | 6 | |
| Campanula serrata | Accepted | Campanula serrata | 2 | |
| Campanula sibirica | Accepted | Campanula sibirica | 1 | |
| Campanula sparsa subsp. sphaerothrix | Accepted | Campanula sparsa subsp. sphaerothrix | 1 | |
| Campanula spicata | Accepted | Campanula spicata | 1 | |
| Campanula stenocodon | Accepted | Campanula stenocodon | 3 | |
| Campanula tanfanii | Accepted | Campanula tanfanii | 1 | |
| Campanula tatrae | Accepted | Campanula tatrae | 1 | |
| Campanula thyrsoides | Accepted | Campanula thyrsoides | 1 | |
| Campanula thyrsoides subsp. carniolica | Accepted | Campanula thyrsoides subsp. carniolica | 1 | |
| Campanula trachelium | Accepted | Campanula trachelium | 2 | |
| Campanula transsilvanica | Accepted | Campanula transsilvanica | 1 | |
| Campanula uniflora | Accepted | Campanula uniflora | 1 | |
| Campanula velebitica | Accepted | Campanula velebitica | 1 | |
| Campanula wanneri | Accepted | Campanula wanneri | 1 | |
| Campanula witasekiana | Accepted | Campanula witasekiana | 2 | |
| Campanula xylocarpa | Accepted | Campanula xylocarpa | 2 | |
| Campanula zoysii | Synonym | Favratia zoysii | 2 | |
| Campomanesia guaviroba | Accepted | Campomanesia guaviroba | 1 | |
| Campomanesia guazumifolia | Accepted | Campomanesia guazumifolia | 1 | |
| Campomanesia hirsuta | Accepted | Campomanesia hirsuta | 1 | |
| Campomanesia xanthocarpa | Accepted | Campomanesia xanthocarpa | 1 | |
| Campynemanthe parva | Accepted | Campynemanthe parva | 1 | |
| Campynemanthe viridiflora | Accepted | Campynemanthe viridiflora | 1 | |
| Cannabis sativa | Accepted | Cannabis sativa | 1 | |
| Capparis spinosa | Accepted | Capparis spinosa | 1 | |
| Capsella bursa-pastoris | Accepted | Capsella bursa-pastoris | 2 | |
| Capsella grandiflora | Accepted | Capsella grandiflora | 1 | |
| Capsella rubella | Accepted | Capsella rubella | 1 | |
| Caragana arborescens | Accepted | Caragana arborescens | 1 | |
| Cardamine alpina | Synonym | Cardamine bellidifolia subsp. alpina | 1 | |
| Cardamine amara | Accepted | Cardamine amara | 1 | |
| Cardamine amara subsp. amara | Synonym | Cardamine amara | 1 | |
| Cardamine amara subsp. opicii | Accepted | Cardamine amara subsp. opicii | 1 | |
| Cardamine asarifolia | Accepted | Cardamine asarifolia | 1 | |
| Cardamine bellidifolia subsp. alpina | Accepted | Cardamine bellidifolia subsp. alpina | 1 | |
| Cardamine bulbifera | Accepted | Cardamine bulbifera | 2 | |
| Cardamine dentata | Synonym | Cardamine pratensis subsp. paludosa | 1 | |
| Cardamine digitata | Accepted | Cardamine digitata | 1 | |
| Cardamine enneaphyllos | Accepted | Cardamine enneaphyllos | 1 | |
| Cardamine flexuosa | Accepted | Cardamine flexuosa | 1 | |
| Cardamine glanduligera | Accepted | Cardamine glanduligera | 1 | |
| Cardamine heptaphylla | Accepted | Cardamine heptaphylla | 1 | |
| Cardamine hirsuta | Accepted | Cardamine hirsuta | 1 | |
| Cardamine impatiens | Accepted | Cardamine impatiens | 2 | |
| Cardamine kitaibelii | Accepted | Cardamine kitaibelii | 1 | |
| Cardamine matthioli | Accepted | Cardamine matthioli | 1 | |
| Cardamine pentaphyllos | Accepted | Cardamine pentaphyllos | 1 | |
| Cardamine plumieri | Accepted | Cardamine plumieri | 1 | |
| Cardamine pratensis | Accepted | Cardamine pratensis | 3 | |
| Cardamine pratensis subsp. angustifolia | Synonym | Cardamine pratensis subsp. polemonioides | 1 | |
| Cardamine purpurea | Accepted | Cardamine purpurea | 1 | |
| Cardamine resedifolia | Accepted | Cardamine resedifolia | 1 | |
| Cardamine trifolia | Accepted | Cardamine trifolia | 1 | |
| Cardaminopsis arenosa subsp. arenosa | Synonym | Arabidopsis arenosa | 1 | |
| Cardaminopsis arenosa subsp. borbasii | Synonym | Arabidopsis arenosa subsp. borbasii | 1 | |
| Cardaminopsis halleri subsp. halleri | Synonym | Arabidopsis halleri | 1 | |
| Cardaminopsis halleri subsp. ovirensis | Synonym | Arabidopsis halleri subsp. ovirensis | 1 | |
| Cardaria draba | Synonym | Lepidium draba | 1 | |
| Carduncellus monspeliensium | Synonym | Carthamus carduncellus subsp. carduncellus | 1 | |
| Carduus acanthoides | Accepted | Carduus acanthoides | 1 | |
| Carduus acicularis | Accepted | Carduus acicularis | 1 | |
| Carduus aurosicus | Accepted | Carduus aurosicus | 1 | |
| Carduus carduelis | Unchecked | 1 | ||
| Carduus collinus | Accepted | Carduus collinus | 1 | |
| Carduus crispus | Accepted | Carduus crispus | 2 | |
| Carduus defloratus | Accepted | Carduus defloratus | 1 | |
| Carduus defloratus subsp. carlinifolius | Accepted | Carduus defloratus subsp. carlinifolius | 1 | |
| Carduus defloratus subsp. crassifolius | Synonym | Carduus defloratus subsp. summanus | 1 | |
| Carduus defloratus subsp. glaucus | Accepted | Carduus defloratus subsp. glaucus | 1 | |
| Carduus defloratus subsp. tridentinus | Synonym | Carduus defloratus subsp. rhaeticus | 1 | |
| Carduus kerneri | Accepted | Carduus kerneri | 1 | |
| Carduus litigiosus | Accepted | Carduus litigiosus | 1 | |
| Carduus nigrescens | Accepted | Carduus nigrescens | 1 | |
| Carduus nutans | Accepted | Carduus nutans | 1 | |
| Carduus nutans subsp. alpicola | Synonym | Carduus nutans subsp. alpicola | 1 | |
| Carduus nutans subsp. platylepis | Accepted | Carduus nutans subsp. platylepis | 1 | |
| Carduus personata | Accepted | Carduus personata | 1 | |
| Carduus pycnocephalus | Accepted | Carduus pycnocephalus | 1 | |
| Carduus tenuiflorus | Accepted | Carduus tenuiflorus | 1 | |
| Carex acuta | Accepted | Carex acuta | 1 | |
| Carex acutiformis | Accepted | Carex acutiformis | 2 | |
| Carex adelostoma | Accepted | Carex adelostoma | 1 | |
| Carex alba | Accepted | Carex alba | 1 | |
| Carex appropinquata | Accepted | Carex appropinquata | 2 | |
| Carex aquatilis | Accepted | Carex aquatilis | 1 | |
| Carex aquatilis subsp. stans | Synonym | Carex aquatilis var. minor | 1 | |
| Carex arctogena | Accepted | Carex arctogena | 1 | |
| Carex arenaria | Accepted | Carex arenaria | 1 | |
| Carex atherodes | Accepted | Carex atherodes | 1 | |
| Carex atrata | Accepted | Carex atrata | 2 | |
| Carex atrata subsp. aterrima | Synonym | Carex atrata subsp. aterrima | 1 | |
| Carex atrofusca | Accepted | Carex atrofusca | 3 | |
| Carex baldensis | Accepted | Carex baldensis | 1 | |
| Carex bicolor | Accepted | Carex bicolor | 2 | |
| Carex bigelowii | Accepted | Carex bigelowii | 2 | |
| Carex bigelowii subsp. dacica | Accepted | Carex bigelowii subsp. dacica | 1 | |
| Carex bigelowii subsp. lugens | Accepted | Carex bigelowii subsp. lugens | 1 | |
| Carex bohemica | Accepted | Carex bohemica | 1 | |
| Carex brachystachys | Accepted | Carex brachystachys | 1 | |
| Carex brevicollis | Accepted | Carex brevicollis | 1 | |
| Carex brizoides | Accepted | Carex brizoides | 1 | |
| Carex brunnescens | Accepted | Carex brunnescens | 2 | |
| Carex brunnescens | Accepted | Carex brunnescens | 1 | |
| Carex buxbaumii | Accepted | Carex buxbaumii | 2 | |
| Carex canescens | Accepted | Carex canescens | 2 | |
| Carex capillaris | Accepted | Carex capillaris | 2 | |
| Carex capillaris subsp. fuscidula | Accepted | Carex capillaris subsp. fuscidula | 1 | |
| Carex capitata | Accepted | Carex capitata | 1 | |
| Carex caryophyllea | Accepted | Carex caryophyllea | 1 | |
| Carex cespitosa | Accepted | Carex cespitosa | 2 | |
| Carex chordorrhiza | Accepted | Carex chordorrhiza | 3 | |
| Carex concinna | Accepted | Carex concinna | 1 | |
| Carex curvula | Accepted | Carex curvula | 2 | |
| Carex curvula subsp. rosae | Accepted | Carex curvula subsp. rosae | 1 | |
| Carex davalliana | Accepted | Carex davalliana | 1 | |
| Carex demissa | Accepted | Carex demissa | 2 | |
| Carex depauperata | Accepted | Carex depauperata | 1 | |
| Carex diandra | Accepted | Carex diandra | 2 | |
| Carex digitata | Accepted | Carex digitata | 3 | |
| Carex dioica | Accepted | Carex dioica | 2 | |
| Carex disperma | Accepted | Carex disperma | 1 | |
| Carex distachya | Accepted | Carex distachya | 1 | |
| Carex distans | Accepted | Carex distans | 1 | |
| Carex disticha | Accepted | Carex disticha | 2 | |
| Carex divisa | Accepted | Carex divisa | 1 | |
| Carex divulsa | Accepted | Carex divulsa | 1 | |
| Carex echinata | Accepted | Carex echinata | 2 | |
| Carex elata | Accepted | Carex elata | 2 | |
| Carex eleusinoides | Accepted | Carex eleusinoides | 1 | |
| Carex elongata | Accepted | Carex elongata | 1 | |
| Carex ericetorum | Accepted | Carex ericetorum | 2 | |
| Carex ferruginea subsp. austroalpina | Synonym | Carex austroalpina | 1 | |
| Carex ferruginea subsp. ferruginea | Synonym | Carex ferruginea | 1 | |
| Carex ferruginea subsp. tendae | Accepted | Carex ferruginea subsp. tendae | 1 | |
| Carex fimbriata | Accepted | Carex fimbriata | 1 | |
| Carex firma | Accepted | Carex firma | 1 | |
| Carex flacca | Accepted | Carex flacca | 2 | |
| Carex flacca subsp. claviformis | Synonym | Carex flacca | 1 | |
| Carex flava | Accepted | Carex flava | 2 | |
| Carex flava var. alpina | Synonym | Carex flava | 1 | |
| Carex foetida | Accepted | Carex foetida | 1 | |
| Carex frigida | Accepted | Carex frigida | 1 | |
| Carex fritschii | Accepted | Carex fritschii | 1 | |
| Carex fuliginosa | Accepted | Carex fuliginosa | 1 | |
| Carex fuliginosa subsp. misandra | Synonym | Carex fuliginosa | 1 | |
| Carex glacialis | Accepted | Carex glacialis | 2 | |
| Carex glareosa | Accepted | Carex glareosa | 1 | |
| Carex globularis | Accepted | Carex globularis | 1 | |
| Carex gmelinii | Accepted | Carex gmelinii | 1 | |
| Carex guestphalica | Synonym | Carex divulsa | 1 | |
| Carex halleriana | Accepted | Carex halleriana | 1 | |
| Carex hartmanii | Accepted | Carex hartmanii | 1 | |
| Carex heleonastes | Accepted | Carex heleonastes | 2 | |
| Carex hirta | Accepted | Carex hirta | 2 | |
| Carex hispida | Accepted | Carex hispida | 1 | |
| Carex holostoma | Accepted | Carex holostoma | 1 | |
| Carex hordeistichos | Accepted | Carex hordeistichos | 1 | |
| Carex hostiana | Accepted | Carex hostiana | 2 | |
| Carex humilis | Accepted | Carex humilis | 1 | |
| Carex juncella | Accepted | Carex juncella | 1 | |
| Carex krausei | Accepted | Carex krausei | 1 | |
| Carex lachenalii | Accepted | Carex lachenalii | 2 | |
| Carex lasiocarpa | Accepted | Carex lasiocarpa | 2 | |
| Carex laxa | Accepted | Carex laxa | 1 | |
| Carex lepidocarpa | Accepted | Carex lepidocarpa | 2 | |
| Carex leporina | Accepted | Carex leporina | 2 | |
| Carex ligerica | Synonym | Carex colchica | 1 | |
| Carex limosa | Accepted | Carex limosa | 1 | |
| Carex liparocarpos | Accepted | Carex liparocarpos | 1 | |
| Carex livida | Accepted | Carex livida | 1 | |
| Carex loliacea | Accepted | Carex loliacea | 1 | |
| Carex lyngbyei | Accepted | Carex lyngbyei | 1 | |
| Carex mackenziei | Accepted | Carex mackenziei | 1 | |
| Carex macloviana | Accepted | Carex macloviana | 1 | |
| Carex mairei | Accepted | Carex mairei | 1 | |
| Carex marina | Accepted | Carex marina | 2 | |
| Carex maritima | Accepted | Carex maritima | 2 | |
| Carex media | Accepted | Carex media | 1 | |
| Carex membranacea | Accepted | Carex membranacea | 1 | |
| Carex michelii | Accepted | Carex michelii | 1 | |
| Carex microglochin | Accepted | Carex microglochin | 2 | |
| Carex montana | Accepted | Carex montana | 1 | |
| Carex mucronata | Accepted | Carex mucronata | 1 | |
| Carex muricata | Accepted | Carex muricata | 1 | |
| Carex nardina | Accepted | Carex nardina | 1 | |
| Carex nardina subsp. hepburnii | Synonym | Carex nardina var. hepburnii | 1 | |
| Carex nigra | Accepted | Carex nigra | 2 | |
| Carex nigra subsp. juncella | Synonym | Carex nigra subsp. juncea | 1 | |
| Carex norvegica | Accepted | Carex norvegica | 1 | |
| Carex norvegica | Accepted | Carex norvegica | 2 | |
| Carex obtusata | Accepted | Carex obtusata | 1 | |
| Carex ornithopoda | Accepted | Carex ornithopoda | 2 | |
| Carex ornithopoda subsp. elongata | Synonym | Carex ornithopoda subsp. ornithopodioides | 1 | |
| Carex ornithopodioides | Synonym | Carex ornithopoda subsp. ornithopodioides | 1 | |
| Carex otrubae | Accepted | Carex otrubae | 1 | |
| Carex pairae | Accepted | Carex pairae | 1 | |
| Carex paleacea | Accepted | Carex paleacea | 1 | |
| Carex pallescens | Accepted | Carex pallescens | 2 | |
| Carex panicea | Accepted | Carex panicea | 2 | |
| Carex paniculata | Accepted | Carex paniculata | 1 | |
| Carex parallela | Accepted | Carex parallela | 1 | |
| Carex parviflora | Accepted | Carex parviflora | 1 | |
| Carex pauciflora | Accepted | Carex pauciflora | 2 | |
| Carex paupercula | Synonym | Carex magellanica subsp. irrigua | 2 | |
| Carex pediformis | Accepted | Carex pediformis | 1 | |
| Carex pediformis subsp. rhizodes | Synonym | Carex rhizina | 1 | |
| Carex pendula | Accepted | Carex pendula | 1 | |
| Carex pilosa | Accepted | Carex pilosa | 1 | |
| Carex pilulifera | Accepted | Carex pilulifera | 2 | |
| Carex podocarpa | Accepted | Carex podocarpa | 2 | |
| Carex praecox | Accepted | Carex praecox | 1 | |
| Carex praticola | Accepted | Carex praticola | 1 | |
| Carex pseudocyperus | Accepted | Carex pseudocyperus | 2 | |
| Carex pulicaris | Accepted | Carex pulicaris | 2 | |
| Carex punctata | Accepted | Carex punctata | 1 | |
| Carex pyrenaica | Accepted | Carex pyrenaica | 1 | |
| Carex rariflora | Accepted | Carex rariflora | 1 | |
| Carex remota | Accepted | Carex remota | 2 | |
| Carex riparia | Accepted | Carex riparia | 1 | |
| Carex rostrata | Accepted | Carex rostrata | 2 | |
| Carex rostrata var. borealis | Synonym | Carex rostrata | 1 | |
| Carex rotundata | Accepted | Carex rotundata | 1 | |
| Carex rufina | Accepted | Carex rufina | 1 | |
| Carex rupestris | Accepted | Carex rupestris | 1 | |
| Carex rupestris | Accepted | Carex rupestris | 1 | |
| Carex salina | Accepted | Carex salina | 1 | |
| Carex saxatilis | Accepted | Carex saxatilis | 1 | |
| Carex saxatilis subsp. laxa | Synonym | Carex saxatilis | 1 | |
| Carex scirpoidea | Accepted | Carex scirpoidea | 2 | |
| Carex sempervirens | Accepted | Carex sempervirens | 1 | |
| Carex serotina | Synonym | Carex viridula | 1 | |
| Carex spicata | Accepted | Carex spicata | 1 | |
| Carex × stenolepis | Accepted | Carex × stenolepis | 1 | |
| Carex stenophylla | Accepted | Carex stenophylla | 1 | |
| Carex strigosa | Accepted | Carex strigosa | 1 | |
| Carex stylosa | Accepted | Carex stylosa | 1 | |
| Carex subspathacea | Accepted | Carex subspathacea | 1 | |
| Carex supina | Accepted | Carex supina | 1 | |
| Carex supina var. spaniocarpa | Accepted | Carex supina var. spaniocarpa | 1 | |
| Carex sylvatica | Accepted | Carex sylvatica | 2 | |
| Carex tenuiflora | Accepted | Carex tenuiflora | 1 | |
| Carex tomentosa | Accepted | Carex tomentosa | 1 | |
| Carex tomentosa | Accepted | Carex tomentosa | 1 | |
| Carex trisperma | Accepted | Carex trisperma | 1 | |
| Carex umbrosa | Accepted | Carex umbrosa | 1 | |
| Carex ursina | Accepted | Carex ursina | 1 | |
| Carex vacillans | Accepted | Carex vacillans | 1 | |
| Carex vaginata | Accepted | Carex vaginata | 3 | |
| Carex vesicaria | Accepted | Carex vesicaria | 2 | |
| Carex viridula | Accepted | Carex viridula | 2 | |
| Carex viridula subsp. viridula | Synonym | Carex viridula | 1 | |
| Carex viridula var. jemtlandica | Synonym | Carex lepidocarpa subsp. jemtlandica | 1 | |
| Carex viridula var. pulchella | Synonym | Carex viridula | 1 | |
| Carex vulpina | Accepted | Carex vulpina | 1 | |
| Carex vulpinoidea | Accepted | Carex vulpinoidea | 1 | |
| Carica papaya | Accepted | Carica papaya | 1 | |
| Cariniana estrellensis | Accepted | Cariniana estrellensis | 1 | |
| Carlina acanthifolia | Accepted | Carlina acanthifolia | 1 | |
| Carlina acaulis subsp. acaulis | Unchecked | 1 | ||
| Carlina acaulis subsp. caulescens | Accepted | Carlina acaulis subsp. caulescens | 1 | |
| Carlina biebersteinii | Accepted | Carlina biebersteinii | 1 | |
| Carlina biebersteinii subsp. brevibracteata | Accepted | Carlina biebersteinii subsp. brevibracteata | 1 | |
| Carlina corymbosa | Accepted | Carlina corymbosa | 1 | |
| Carlina vulgaris | Accepted | Carlina vulgaris | 2 | |
| Carpesium cernuum | Accepted | Carpesium cernuum | 1 | |
| Carpinus betulus | Accepted | Carpinus betulus | 1 | |
| Carpobrotus acinaciformis | Accepted | Carpobrotus acinaciformis | 1 | |
| Carpodetus serratus | Accepted | Carpodetus serratus | 1 | |
| Carthamus lanatus | Accepted | Carthamus lanatus | 1 | |
| Carum carvi | Accepted | Carum carvi | 2 | |
| Carum verticillatum | Synonym | Trocdaris verticillata | 1 | |
| Caryocar brasiliense | Accepted | Caryocar brasiliense | 1 | |
| Caryocar glabrum | Accepted | Caryocar glabrum | 1 | |
| Casearia javitensis | Synonym | Piparea multiflora | 1 | |
| Cassiope stelleriana | Synonym | Harrimanella stelleriana | 1 | |
| Cassiope tetragona | Accepted | Cassiope tetragona | 1 | |
| Cassipourea guianensis | Accepted | Cassipourea guianensis | 2 | |
| Castanea sativa | Accepted | Castanea sativa | 1 | |
| Castilleja caudata | Accepted | Castilleja caudata | 1 | |
| Castilleja fissifolia | Accepted | Castilleja fissifolia | 1 | |
| Castilleja hyperborea | Accepted | Castilleja hyperborea | 1 | |
| Castilleja raupii | Accepted | Castilleja raupii | 1 | |
| Castilleja unalaschcensis | Accepted | Castilleja unalaschcensis | 1 | |
| Catabrosa aquatica | Accepted | Catabrosa aquatica | 4 | |
| Catananche caerulea | Accepted | Catananche caerulea | 1 | |
| Catapodium rigidum | Accepted | Catapodium rigidum | 1 | |
| Cathedra acuminata | Accepted | Cathedra acuminata | 1 | |
| Catostemma fragrans | Accepted | Catostemma fragrans | 1 | |
| Caucalis platycarpos | Accepted | Caucalis platycarpos | 1 | |
| Cedrela fissilis | Accepted | Cedrela fissilis | 2 | |
| Cedrelinga cateniformis | Accepted | Cedrelinga cateniformis | 1 | |
| Cedrus atlantica | Accepted | Cedrus atlantica | 1 | |
| Celtis australis | Accepted | Celtis australis | 1 | |
| Centaurea alpina | Synonym | Rhaponticoides alpina | 1 | |
| Centaurea aspera | Accepted | Centaurea aspera | 1 | |
| Centaurea calcitrapa | Accepted | Centaurea calcitrapa | 1 | |
| Centaurea calocephala | Accepted | Centaurea calocephala | 1 | |
| Centaurea calvescens | Synonym | Centaurea reichenbachii | 1 | |
| Centaurea collina | Accepted | Centaurea collina | 1 | |
| Centaurea coziensis | Accepted | Centaurea coziensis | 1 | |
| Centaurea cyanus | Accepted | Centaurea cyanus | 1 | |
| Centaurea dichroantha | Accepted | Centaurea dichroantha | 1 | |
| Centaurea jacea | Accepted | Centaurea jacea | 3 | |
| Centaurea jacea | Accepted | Centaurea jacea | 1 | |
| Centaurea jacea subsp. angustifolia | Unchecked | 1 | ||
| Centaurea jacea subsp. timbalii | Accepted | Centaurea jacea subsp. timbalii | 1 | |
| Centaurea jordaniana | Accepted | Centaurea jordaniana | 1 | |
| Centaurea jordaniana | Accepted | Centaurea jordaniana | 1 | |
| Centaurea jordaniana subsp. balbisiana | Accepted | Centaurea jordaniana subsp. balbisiana | 1 | |
| Centaurea julica | Synonym | Centaurea jacea subsp. julica | 1 | |
| Centaurea kotschyana | Accepted | Centaurea kotschyana | 1 | |
| Centaurea leucophaea | Accepted | Centaurea leucophaea | 1 | |
| Centaurea lugdunensis | Accepted | Centaurea lugdunensis | 1 | |
| Centaurea montana | Accepted | Centaurea montana | 2 | |
| Centaurea nemoralis | Accepted | Centaurea nemoralis | 1 | |
| Centaurea nervosa | Accepted | Centaurea nervosa | 1 | |
| Centaurea nigra | Accepted | Centaurea nigra | 1 | |
| Centaurea nigra | Accepted | Centaurea nigra | 1 | |
| Centaurea nigrescens | Accepted | Centaurea nigrescens | 1 | |
| Centaurea nigrescens | Accepted | Centaurea nigrescens | 1 | |
| Centaurea paniculata | Accepted | Centaurea paniculata | 1 | |
| Centaurea pectinata | Accepted | Centaurea pectinata | 1 | |
| Centaurea phrygia subsp. stenolepis | Accepted | Centaurea phrygia subsp. stenolepis | 1 | |
| Centaurea pinnatifida | Accepted | Centaurea pinnatifida | 1 | |
| Centaurea pseudophrygia | Synonym | Centaurea phrygia subsp. pseudophrygia | 1 | |
| Centaurea rhaetica | Accepted | Centaurea rhaetica | 1 | |
| Centaurea rupestris | Accepted | Centaurea rupestris | 1 | |
| Centaurea scabiosa | Accepted | Centaurea scabiosa | 2 | |
| Centaurea scabiosa subsp. alpestris | Accepted | Centaurea scabiosa subsp. alpestris | 1 | |
| Centaurea scabiosa subsp. badensis | Accepted | Centaurea scabiosa subsp. badensis | 1 | |
| Centaurea scabiosa subsp. fritschii | Accepted | Centaurea scabiosa subsp. fritschii | 1 | |
| Centaurea scabiosa subsp. grinensis | Accepted | Centaurea scabiosa subsp. grinensis | 1 | |
| Centaurea solstitialis | Accepted | Centaurea solstitialis | 1 | |
| Centaurea splendens | Synonym | Centaurea margaritacea | 1 | |
| Centaurea stoebe | Accepted | Centaurea stoebe | 1 | |
| Centaurea thuillieri | Accepted | Centaurea thuillieri | 1 | |
| Centaurea triniifolia | Accepted | Centaurea triniifolia | 1 | |
| Centaurea triumfettii | Accepted | Centaurea triumfettii | 2 | |
| Centaurea uniflora | Accepted | Centaurea uniflora | 1 | |
| Centaurea vallesiaca | Accepted | Centaurea vallesiaca | 1 | |
| Centaurium erythraea | Accepted | Centaurium erythraea | 1 | |
| Centaurium favargeri | Accepted | Centaurium favargeri | 1 | |
| Centaurium pulchellum | Accepted | Centaurium pulchellum | 2 | |
| Centranthus angustifolius | Synonym | Valeriana nevadensis | 1 | |
| Centranthus calcitrapae | Synonym | Valeriana calcitrapae | 2 | |
| Centranthus lecoqii | Synonym | Valeriana lecoqii | 1 | |
| Centranthus ruber | Synonym | Valeriana rubra | 1 | |
| Cephalanthera damasonium | Accepted | Cephalanthera damasonium | 1 | |
| Cephalanthera longifolia | Accepted | Cephalanthera longifolia | 1 | |
| Cephalanthera rubra | Accepted | Cephalanthera rubra | 1 | |
| Cephalaria alpina | Accepted | Cephalaria alpina | 1 | |
| Cephalaria laevigata | Accepted | Cephalaria laevigata | 1 | |
| Cephalaria leucantha | Accepted | Cephalaria leucantha | 1 | |
| Cephalaria radiata | Accepted | Cephalaria radiata | 1 | |
| Cephalaria uralensis | Accepted | Cephalaria uralensis | 1 | |
| Cephalotus follicularis | Accepted | Cephalotus follicularis | 1 | |
| Cerastium alpinum | Accepted | Cerastium alpinum | 2 | |
| Cerastium alpinum subsp. alpinum | Synonym | Cerastium alpinum | 1 | |
| Cerastium alpinum subsp. lanatum | Synonym | Cerastium alpinum var. lanatum | 1 | |
| Cerastium alpinum subsp. lanatum | Synonym | Cerastium alpinum var. lanatum | 1 | |
| Cerastium arvense subsp. arvense | Synonym | Cerastium arvense | 1 | |
| Cerastium arvense subsp. lerchenfeldianum | Accepted | Cerastium arvense subsp. lerchenfeldianum | 1 | |
| Cerastium arvense subsp. molle | Accepted | Cerastium arvense subsp. molle | 1 | |
| Cerastium arvense subsp. strictum | Accepted | Cerastium arvense subsp. strictum | 1 | |
| Cerastium arvense subsp. suffruticosum | Accepted | Cerastium arvense subsp. suffruticosum | 1 | |
| Cerastium banaticum | Accepted | Cerastium banaticum | 1 | |
| Cerastium beeringianum | Accepted | Cerastium beeringianum | 1 | |
| Cerastium brachypetalum | Accepted | Cerastium brachypetalum | 1 | |
| Cerastium carinthiacum | Accepted | Cerastium carinthiacum | 1 | |
| Cerastium carinthiacum subsp. austroalpinum | Accepted | Cerastium carinthiacum subsp. austroalpinum | 1 | |
| Cerastium cerastoides | Accepted | Cerastium cerastoides | 2 | |
| Cerastium eriophorum | Accepted | Cerastium eriophorum | 1 | |
| Cerastium fontanum | Accepted | Cerastium fontanum | 1 | |
| Cerastium fontanum subsp. fontanum | Synonym | Cerastium fontanum | 2 | |
| Cerastium fontanum subsp. lucorum | Accepted | Cerastium fontanum subsp. lucorum | 1 | |
| Cerastium fontanum subsp. vulgare | Accepted | Cerastium fontanum subsp. vulgare | 1 | |
| Cerastium glomeratum | Accepted | Cerastium glomeratum | 1 | |
| Cerastium glutinosum | Synonym | Cerastium latifolium | 1 | |
| Cerastium jenisejense | Synonym | Cerastium regelii | 1 | |
| Cerastium julicum | Accepted | Cerastium julicum | 1 | |
| Cerastium latifolium | Accepted | Cerastium latifolium | 1 | |
| Cerastium ligusticum | Accepted | Cerastium ligusticum | 1 | |
| Cerastium lineare | Accepted | Cerastium lineare | 1 | |
| Cerastium maximum | Accepted | Cerastium maximum | 1 | |
| Cerastium nigrescens | Accepted | Cerastium nigrescens | 1 | |
| Cerastium pedunculatum | Accepted | Cerastium pedunculatum | 1 | |
| Cerastium pumilum | Accepted | Cerastium pumilum | 1 | |
| Cerastium regelii | Accepted | Cerastium regelii | 2 | |
| Cerastium semidecandrum | Accepted | Cerastium semidecandrum | 2 | |
| Cerastium subtriflorum | Accepted | Cerastium subtriflorum | 1 | |
| Cerastium sylvaticum | Accepted | Cerastium sylvaticum | 1 | |
| Cerastium tatrae | Synonym | Cerastium arvense | 1 | |
| Cerastium tomentosum | Accepted | Cerastium tomentosum | 2 | |
| Cerastium uniflorum | Accepted | Cerastium uniflorum | 1 | |
| Ceratophyllum demersum | Accepted | Ceratophyllum demersum | 1 | |
| Ceratophyllum submersum | Accepted | Ceratophyllum submersum | 2 | |
| Ceratostigma plumbaginoides | Accepted | Ceratostigma plumbaginoides | 1 | |
| Cercis siliquastrum | Accepted | Cercis siliquastrum | 1 | |
| Cerinthe glabra | Accepted | Cerinthe glabra | 1 | |
| Cerinthe minor | Accepted | Cerinthe minor | 1 | |
| Cerinthe minor subsp. auriculata | Accepted | Cerinthe minor subsp. auriculata | 1 | |
| Ceterach officinarum | Synonym | Asplenium ceterach | 1 | |
| Chaenorhinum minus | Accepted | Chaenorhinum minus | 2 | |
| Chaenorhinum origanifolium | Accepted | Chaenorhinum origanifolium | 1 | |
| Chaenorhinum rubrifolium | Accepted | Chaenorhinum rubrifolium | 1 | |
| Chaerophyllum aromaticum | Accepted | Chaerophyllum aromaticum | 1 | |
| Chaerophyllum aureum | Accepted | Chaerophyllum aureum | 1 | |
| Chaerophyllum elegans | Accepted | Chaerophyllum elegans | 1 | |
| Chaerophyllum hirsutum | Accepted | Chaerophyllum hirsutum | 2 | |
| Chaerophyllum temulum | Accepted | Chaerophyllum temulum | 1 | |
| Chaerophyllum villarsii | Accepted | Chaerophyllum villarsii | 1 | |
| Chamaecytisus hirsutus subsp. pumilus | Synonym | Chamaecytisus triflorus subsp. pumilus | 1 | |
| Chamaecytisus purpureus | Accepted | Chamaecytisus purpureus | 1 | |
| Chamaecytisus ratisbonensis | Accepted | Chamaecytisus ratisbonensis | 1 | |
| Chamaecytisus supinus | Accepted | Chamaecytisus supinus | 1 | |
| Chamaedaphne calyculata | Accepted | Chamaedaphne calyculata | 1 | |
| Chamerion angustifolium | Synonym | Epilobium angustifolium | 2 | |
| Chamerion latifolium | Synonym | Epilobium latifolium | 1 | |
| Chamorchis alpina | Accepted | Chamorchis alpina | 2 | |
| Chaunochiton kappleri | Accepted | Chaunochiton kappleri | 1 | |
| Cheilanthes acrostica | Synonym | Hemionitis acrostica | 1 | |
| Cheiloclinium cognatum | Accepted | Cheiloclinium cognatum | 1 | |
| Chelidonium majus | Accepted | Chelidonium majus | 2 | |
| Chenopodium album | Accepted | Chenopodium album | 1 | |
| Chenopodium ambrosioides | Synonym | Dysphania ambrosioides | 1 | |
| Chenopodium bonus-henricus | Accepted | Chenopodium bonus-henricus | 1 | |
| Chenopodium botrys | Synonym | Dysphania botrys | 1 | |
| Chenopodium ficifolium | Accepted | Chenopodium ficifolium | 1 | |
| Chenopodium glaucum | Accepted | Chenopodium glaucum | 1 | |
| Chenopodium hybridum | Accepted | Chenopodium hybridum | 1 | |
| Chenopodium murale | Accepted | Chenopodium murale | 1 | |
| Chenopodium opulifolium | Accepted | Chenopodium opulifolium | 1 | |
| Chenopodium polyspermum | Accepted | Chenopodium polyspermum | 2 | |
| Chenopodium rubrum | Accepted | Chenopodium rubrum | 1 | |
| Chenopodium strictum | Accepted | Chenopodium strictum | 1 | |
| Chenopodium suecicum | Accepted | Chenopodium suecicum | 1 | |
| Chenopodium urbicum | Accepted | Chenopodium urbicum | 1 | |
| Chenopodium vulvaria | Accepted | Chenopodium vulvaria | 1 | |
| Chiliadenus glutinosus | Accepted | Chiliadenus glutinosus | 1 | |
| Chimaphila umbellata | Accepted | Chimaphila umbellata | 1 | |
| Chimarrhis turbinata | Accepted | Chimarrhis turbinata | 1 | |
| Chondrilla chondrilloides | Accepted | Chondrilla chondrilloides | 1 | |
| Chondrilla juncea | Accepted | Chondrilla juncea | 1 | |
| Chorispora tenella | Accepted | Chorispora tenella | 1 | |
| Chrozophora tinctoria | Accepted | Chrozophora tinctoria | 1 | |
| Chrysophyllum | Accepted | Chrysophyllum | 1 | |
| Chrysophyllum amazonicum | Accepted | Chrysophyllum amazonicum | 1 | |
| Chrysophyllum argenteum | Accepted | Chrysophyllum argenteum | 1 | |
| Chrysophyllum beguei | Synonym | Gambeya beguei | 1 | |
| Chrysophyllum bombycinum | Accepted | Chrysophyllum bombycinum | 1 | |
| Chrysophyllum boukokoense | Synonym | Gambeya boukokoensis | 1 | |
| Chrysophyllum flexuosum | Accepted | Chrysophyllum flexuosum | 1 | |
| Chrysophyllum gonocarpum | Accepted | Chrysophyllum gonocarpum | 1 | |
| Chrysophyllum inornatum | Accepted | Chrysophyllum inornatum | 1 | |
| Chrysophyllum lacourtianum | Synonym | Gambeya lacourtiana | 1 | |
| Chrysophyllum lucentifolium | Accepted | Chrysophyllum lucentifolium | 1 | |
| Chrysophyllum manaosense | Accepted | Chrysophyllum manaosense | 1 | |
| Chrysophyllum prieurii | Accepted | Chrysophyllum prieurii | 1 | |
| Chrysophyllum roxburghii | Accepted | Chrysophyllum roxburghii | 1 | |
| Chrysophyllum viride | Accepted | Chrysophyllum viride | 1 | |
| Chrysopogon gryllus | Accepted | Chrysopogon gryllus | 1 | |
| Chrysosplenium alpinum | Accepted | Chrysosplenium alpinum | 1 | |
| Chrysosplenium alternifolium | Accepted | Chrysosplenium alternifolium | 2 | |
| Chrysosplenium oppositifolium | Accepted | Chrysosplenium oppositifolium | 1 | |
| Chrysosplenium tetrandrum | Accepted | Chrysosplenium tetrandrum | 1 | |
| Chrysosplenium wrightii | Accepted | Chrysosplenium wrightii | 1 | |
| Cicendia filiformis | Accepted | Cicendia filiformis | 1 | |
| Cicerbita alpina | Accepted | Cicerbita alpina | 3 | |
| Cicerbita macrophylla | Accepted | Cicerbita macrophylla | 2 | |
| Cicerbita plumieri | Accepted | Cicerbita plumieri | 2 | |
| Cichorium intybus | Accepted | Cichorium intybus | 2 | |
| Cicuta virosa | Accepted | Cicuta virosa | 2 | |
| Cinna latifolia | Accepted | Cinna latifolia | 1 | |
| Cinnamodendron dinisii | Accepted | Cinnamodendron dinisii | 2 | |
| Cinnamomum glanduliferum | Accepted | Cinnamomum glanduliferum | 1 | |
| Circaea alpina | Accepted | Circaea alpina | 1 | |
| Circaea × intermedia | Accepted | Circaea × intermedia | 1 | |
| Circaea lutetiana | Accepted | Circaea lutetiana | 1 | |
| Circaeaster agrestis | Accepted | Circaeaster agrestis | 1 | |
| Cirsium acaule | Accepted | Cirsium acaule | 1 | |
| Cirsium arvense | Accepted | Cirsium arvense | 2 | |
| Cirsium candelabrum | Accepted | Cirsium candelabrum | 1 | |
| Cirsium canum | Accepted | Cirsium canum | 1 | |
| Cirsium carniolicum | Accepted | Cirsium carniolicum | 1 | |
| Cirsium eriophorum subsp. eriophorum | Synonym | Cirsium eriophorum | 1 | |
| Cirsium eriophorum subsp. spathulatum | Synonym | Cirsium spathulatum | 1 | |
| Cirsium erisithales | Accepted | Cirsium erisithales | 1 | |
| Cirsium ferox | Accepted | Cirsium ferox | 1 | |
| Cirsium furiens | Accepted | Cirsium furiens | 1 | |
| Cirsium helenioides | Accepted | Cirsium helenioides | 2 | |
| Cirsium heterophyllum | Accepted | Cirsium heterophyllum | 1 | |
| Cirsium monspessulanum | Accepted | Cirsium monspessulanum | 1 | |
| Cirsium montanum | Unchecked | 1 | ||
| Cirsium morisianum | Accepted | Cirsium morisianum | 1 | |
| Cirsium oleraceum | Accepted | Cirsium oleraceum | 2 | |
| Cirsium palustre | Accepted | Cirsium palustre | 2 | |
| Cirsium pannonicum | Accepted | Cirsium pannonicum | 1 | |
| Cirsium rivulare | Accepted | Cirsium rivulare | 1 | |
| Cirsium spinosissimum | Accepted | Cirsium spinosissimum | 1 | |
| Cirsium tuberosum | Accepted | Cirsium tuberosum | 1 | |
| Cirsium vulgare | Accepted | Cirsium vulgare | 1 | |
| Cirsium waldsteinii | Accepted | Cirsium waldsteinii | 1 | |
| Cistus albidus | Accepted | Cistus albidus | 1 | |
| Cistus laurifolius | Accepted | Cistus laurifolius | 1 | |
| Cistus monspeliensis | Accepted | Cistus monspeliensis | 1 | |
| Cistus salviifolius | Accepted | Cistus salviifolius | 1 | |
| Citronella paniculata | Accepted | Citronella paniculata | 2 | |
| Cladium mariscus | Accepted | Cladium mariscus | 2 | |
| Claytonia eschscholtzii | Accepted | Claytonia eschscholtzii | 1 | |
| Claytonia sarmentosa | Accepted | Claytonia sarmentosa | 1 | |
| Claytonia scammaniana | Accepted | Claytonia scammaniana | 1 | |
| Claytonia tuberosa | Accepted | Claytonia tuberosa | 1 | |
| Cleistogenes serotina | Accepted | Cleistogenes serotina | 1 | |
| Clematis alpina | Accepted | Clematis alpina | 1 | |
| Clematis flammula | Accepted | Clematis flammula | 1 | |
| Clematis recta | Accepted | Clematis recta | 1 | |
| Clematis sibirica | Synonym | Clematis alpina subsp. sibirica | 1 | |
| Clematis vitalba | Accepted | Clematis vitalba | 1 | |
| Cleome aculeata | Accepted | Cleome aculeata | 1 | |
| Cleome rutidosperma | Accepted | Cleome rutidosperma | 1 | |
| Clethra scabra | Accepted | Clethra scabra | 1 | |
| Clinopodium acinos | Accepted | Clinopodium acinos | 1 | |
| Clinopodium alpinum subsp. majoranifolium | Accepted | Clinopodium alpinum subsp. majoranifolium | 1 | |
| Clinopodium pulegium | Accepted | Clinopodium pulegium | 2 | |
| Clinopodium vulgare | Accepted | Clinopodium vulgare | 1 | |
| Clusia grandiflora | Accepted | Clusia grandiflora | 1 | |
| Clypeola jonthlaspi | Accepted | Clypeola jonthlaspi | 1 | |
| Cnicus benedictus | Synonym | Centaurea benedicta | 1 | |
| Cnidium silaifolium | Accepted | Cnidium silaifolium | 1 | |
| Coccoloba mollis | Accepted | Coccoloba mollis | 1 | |
| Cochlearia | Accepted | Cochlearia | 1 | |
| Cochlearia arctica | Synonym | Cochlearia groenlandica | 1 | |
| Cochlearia danica | Accepted | Cochlearia danica | 1 | |
| Cochlearia groenlandica | Accepted | Cochlearia groenlandica | 1 | |
| Cochlearia officinalis | Accepted | Cochlearia officinalis | 1 | |
| Cochlearia officinalis subsp. integrifolia | Accepted | Cochlearia officinalis subsp. integrifolia | 1 | |
| Cochlearia officinalis subsp. officinalis | Synonym | Cochlearia officinalis | 1 | |
| Cochlearia pyrenaica subsp. excelsa | Synonym | Cochlearia pyrenaica | 1 | |
| Cochlearia pyrenaica subsp. pyrenaica | Synonym | Cochlearia pyrenaica | 1 | |
| Cochlearia tatrae | Accepted | Cochlearia tatrae | 1 | |
| Coeloglossum viride | Synonym | Dactylorhiza viridis | 2 | |
| Coincya cheiranthos subsp. cheiranthos | Synonym | Coincya monensis subsp. cheiranthos | 1 | |
| Coincya cheiranthos subsp. montana | Synonym | Coincya monensis subsp. cheiranthos | 1 | |
| Coincya richeri | Accepted | Coincya richeri | 1 | |
| Colchicum alpinum | Accepted | Colchicum alpinum | 1 | |
| Colchicum autumnale | Accepted | Colchicum autumnale | 1 | |
| Colutea arborescens | Accepted | Colutea arborescens | 1 | |
| Colutea arborescens subsp. gallica | Accepted | Colutea arborescens subsp. gallica | 1 | |
| Comarum palustre | Accepted | Comarum palustre | 1 | |
| Commelina communis | Accepted | Commelina communis | 2 | |
| Conceveiba guianensis | Accepted | Conceveiba guianensis | 1 | |
| Conioselinum | Accepted | Conioselinum | 1 | |
| Conioselinum tataricum | Accepted | Conioselinum tataricum | 1 | |
| Conium maculatum | Accepted | Conium maculatum | 1 | |
| Connarus rostratus | Accepted | Connarus rostratus | 1 | |
| Conopodium majus | Accepted | Conopodium majus | 2 | |
| Conringia orientalis | Accepted | Conringia orientalis | 1 | |
| Consolida ajacis | Synonym | Delphinium ajacis | 1 | |
| Consolida hispanica | Synonym | Delphinium hispanicum | 1 | |
| Consolida orientalis | Synonym | Delphinium ajacis | 1 | |
| Consolida pubescens | Synonym | Delphinium pubescens | 1 | |
| Consolida regalis | Synonym | Delphinium consolida | 1 | |
| Convallaria majalis | Accepted | Convallaria majalis | 2 | |
| Convolvulus arvensis | Accepted | Convolvulus arvensis | 2 | |
| Convolvulus cantabrica | Accepted | Convolvulus cantabrica | 1 | |
| Conyza bonariensis | Synonym | Erigeron bonariensis | 1 | |
| Conyza canadensis | Synonym | Erigeron canadensis | 1 | |
| Conyza sumatrensis | Synonym | Erigeron sumatrensis | 1 | |
| Corallorhiza trifida | Accepted | Corallorhiza trifida | 2 | |
| Corbichonia decumbens | Accepted | Corbichonia decumbens | 1 | |
| Cordia sagotii | Accepted | Cordia sagotii | 1 | |
| Coriaria myrtifolia | Accepted | Coriaria myrtifolia | 1 | |
| Coris monspeliensis | Accepted | Coris monspeliensis | 1 | |
| Cornus alba | Accepted | Cornus alba | 1 | |
| Cornus florida | Accepted | Cornus florida | 1 | |
| Cornus mas | Accepted | Cornus mas | 1 | |
| Cornus sanguinea | Accepted | Cornus sanguinea | 2 | |
| Cornus sericea | Accepted | Cornus sericea | 1 | |
| Cornus suecica | Accepted | Cornus suecica | 1 | |
| Coronilla coronata | Accepted | Coronilla coronata | 1 | |
| Coronilla juncea | Accepted | Coronilla juncea | 1 | |
| Coronilla minima | Accepted | Coronilla minima | 1 | |
| Coronilla minima subsp. lotoides | Accepted | Coronilla minima subsp. lotoides | 1 | |
| Coronilla scorpioides | Accepted | Coronilla scorpioides | 1 | |
| Coronilla vaginalis | Accepted | Coronilla vaginalis | 1 | |
| Coronopus didymus | Synonym | Lepidium didymum | 1 | |
| Coronopus squamatus | Synonym | Lepidium coronopus | 1 | |
| Corrigiola litoralis | Accepted | Corrigiola litoralis | 1 | |
| Cortaderia selloana | Accepted | Cortaderia selloana | 1 | |
| Cortusa matthioli | Synonym | Primula matthioli | 1 | |
| Corydalis alba | Synonym | Pseudofumaria alba | 1 | |
| Corydalis cava | Accepted | Corydalis cava | 1 | |
| Corydalis intermedia | Accepted | Corydalis intermedia | 2 | |
| Corydalis lutea | Synonym | Pseudofumaria lutea | 1 | |
| Corydalis pumila | Accepted | Corydalis pumila | 1 | |
| Corydalis solida | Accepted | Corydalis solida | 2 | |
| Corylus avellana | Accepted | Corylus avellana | 1 | |
| Corylus colurna | Accepted | Corylus colurna | 1 | |
| Corynephorus canescens | Accepted | Corynephorus canescens | 2 | |
| Corynocarpus dissimilis | Accepted | Corynocarpus dissimilis | 1 | |
| Costus deistelii | Synonym | Costus afer | 1 | |
| Cota macrantha | Accepted | Cota macrantha | 1 | |
| Cota tinctoria | Accepted | Cota tinctoria | 2 | |
| Cotinus coggygria | Accepted | Cotinus coggygria | 1 | |
| Cotoneaster atlanticus | Synonym | Cotoneaster granatensis | 1 | |
| Cotoneaster delphinensis | Accepted | Cotoneaster delphinensis | 1 | |
| Cotoneaster horizontalis | Accepted | Cotoneaster horizontalis | 1 | |
| Cotoneaster integerrimus | Accepted | Cotoneaster integerrimus | 1 | |
| Cotoneaster juranus | Synonym | Cotoneaster integerrimus | 1 | |
| Cotoneaster lucidus | Accepted | Cotoneaster lucidus | 1 | |
| Cotoneaster raboutensis | Accepted | Cotoneaster raboutensis | 1 | |
| Cotoneaster salicifolius | Accepted | Cotoneaster salicifolius | 1 | |
| Cotoneaster tomentosus | Accepted | Cotoneaster tomentosus | 1 | |
| Couratari calycina | Accepted | Couratari calycina | 1 | |
| Couratari guianensis | Accepted | Couratari guianensis | 1 | |
| Couratari multiflora | Accepted | Couratari multiflora | 1 | |
| Crambe maritima | Accepted | Crambe maritima | 1 | |
| Crambe tatarica | Accepted | Crambe tatarica | 1 | |
| Crataegus laevigata | Accepted | Crataegus laevigata | 1 | |
| Crataegus monogyna | Accepted | Crataegus monogyna | 2 | |
| Crataegus rhipidophylla | Accepted | Crataegus rhipidophylla | 1 | |
| Crataegus sanguinea | Accepted | Crataegus sanguinea | 1 | |
| Crepis albida | Accepted | Crepis albida | 1 | |
| Crepis alpestris | Accepted | Crepis alpestris | 1 | |
| Crepis aurea | Accepted | Crepis aurea | 1 | |
| Crepis biennis | Accepted | Crepis biennis | 1 | |
| Crepis bocconei | Synonym | Crepis pontana | 1 | |
| Crepis bursifolia | Accepted | Crepis bursifolia | 1 | |
| Crepis capillaris | Accepted | Crepis capillaris | 1 | |
| Crepis chondrilloides | Accepted | Crepis chondrilloides | 1 | |
| Crepis conyzifolia | Accepted | Crepis conyzifolia | 1 | |
| Crepis foetida | Accepted | Crepis foetida | 1 | |
| Crepis froelichiana | Accepted | Crepis froelichiana | 1 | |
| Crepis froelichiana subsp. dinarica | Accepted | Crepis froelichiana subsp. dinarica | 1 | |
| Crepis jacquinii | Accepted | Crepis jacquinii | 1 | |
| Crepis kerneri | Synonym | Crepis jacquinii subsp. kerneri | 1 | |
| Crepis mollis | Accepted | Crepis mollis | 2 | |
| Crepis nana | Synonym | Askellia pygmaea | 1 | |
| Crepis nemausensis | Unchecked | 1 | ||
| Crepis nicaeensis | Accepted | Crepis nicaeensis | 1 | |
| Crepis paludosa | Accepted | Crepis paludosa | 2 | |
| Crepis praemorsa | Accepted | Crepis praemorsa | 2 | |
| Crepis pulchra | Accepted | Crepis pulchra | 1 | |
| Crepis pygmaea | Accepted | Crepis pygmaea | 1 | |
| Crepis pyrenaica | Accepted | Crepis pyrenaica | 1 | |
| Crepis rhaetica | Accepted | Crepis rhaetica | 1 | |
| Crepis setosa | Accepted | Crepis setosa | 1 | |
| Crepis suffreniana | Accepted | Crepis suffreniana | 1 | |
| Crepis tectorum | Accepted | Crepis tectorum | 2 | |
| Crepis terglouensis | Accepted | Crepis terglouensis | 1 | |
| Crepis vesicaria | Accepted | Crepis vesicaria | 1 | |
| Crepis vesicaria subsp. taraxacifolia | Accepted | Crepis vesicaria subsp. taraxacifolia | 1 | |
| Crepis zacintha | Accepted | Crepis zacintha | 1 | |
| Crinodendron hookerianum | Accepted | Crinodendron hookerianum | 1 | |
| Crocus albiflorus | Synonym | Crocus caeruleus | 1 | |
| Crocus banaticus | Accepted | Crocus banaticus | 1 | |
| Crocus chrysanthus | Accepted | Crocus chrysanthus | 1 | |
| Crocus discolor | Synonym | Crocus heuffelianus subsp. scepusiensis | 1 | |
| Crocus heuffelianus | Accepted | Crocus heuffelianus | 1 | |
| Crocus ligusticus | Accepted | Crocus ligusticus | 1 | |
| Crocus sativus | Accepted | Crocus sativus | 1 | |
| Crocus vernus | Accepted | Crocus vernus | 4 | |
| Crocus versicolor | Accepted | Crocus versicolor | 1 | |
| Crucianella angustifolia | Accepted | Crucianella angustifolia | 1 | |
| Crucianella latifolia | Accepted | Crucianella latifolia | 1 | |
| Cruciata glabra | Accepted | Cruciata glabra | 1 | |
| Cruciata laevipes | Accepted | Cruciata laevipes | 1 | |
| Cruciata pedemontana | Accepted | Cruciata pedemontana | 1 | |
| Crupina vulgaris | Accepted | Crupina vulgaris | 1 | |
| Crypsis alopecuroides | Accepted | Crypsis alopecuroides | 1 | |
| Crypsis schoenoides | Accepted | Crypsis schoenoides | 1 | |
| Cryptocarya mandioccana | Accepted | Cryptocarya mandioccana | 1 | |
| Cryptogramma crispa | Accepted | Cryptogramma crispa | 2 | |
| Cucubalus baccifer | Synonym | Silene baccifera | 1 | |
| Cupania scrobiculata | Accepted | Cupania scrobiculata | 1 | |
| Cupressus sempervirens | Accepted | Cupressus sempervirens | 2 | |
| Cuscuta campestris | Accepted | Cuscuta campestris | 1 | |
| Cuscuta cesatiana | Synonym | Cuscuta australis var. cesatiana | 1 | |
| Cuscuta epithymum | Accepted | Cuscuta epithymum | 1 | |
| Cuscuta epithymum subsp. kotschyi | Unchecked | 1 | ||
| Cuscuta europaea | Accepted | Cuscuta europaea | 2 | |
| Cuscuta planiflora | Accepted | Cuscuta planiflora | 1 | |
| Cuscuta scandens | Accepted | Cuscuta scandens | 1 | |
| Cyanus maramarosiensis | Synonym | Centaurea maramarosiensis | 1 | |
| Cyanus mollis | Synonym | Centaurea mollis | 1 | |
| Cyclamen purpurascens | Accepted | Cyclamen purpurascens | 1 | |
| Cymbalaria muralis | Accepted | Cymbalaria muralis | 2 | |
| Cynodon dactylon | Accepted | Cynodon dactylon | 1 | |
| Cynoglossum cheirifolium | Synonym | Pardoglossum cheirifolium | 1 | |
| Cynoglossum creticum | Accepted | Cynoglossum creticum | 1 | |
| Cynoglossum dioscoridis | Accepted | Cynoglossum dioscoridis | 1 | |
| Cynoglossum officinale | Accepted | Cynoglossum officinale | 1 | |
| Cynosurus cristatus | Accepted | Cynosurus cristatus | 2 | |
| Cynosurus echinatus | Accepted | Cynosurus echinatus | 1 | |
| Cynosurus effusus | Synonym | Cynosurus elegans | 1 | |
| Cyperus eragrostis | Accepted | Cyperus eragrostis | 2 | |
| Cyperus esculentus | Accepted | Cyperus esculentus | 1 | |
| Cyperus flavescens | Accepted | Cyperus flavescens | 1 | |
| Cyperus fuscus | Accepted | Cyperus fuscus | 1 | |
| Cyperus glomeratus | Accepted | Cyperus glomeratus | 1 | |
| Cyperus longus | Accepted | Cyperus longus | 1 | |
| Cyperus rotundus | Accepted | Cyperus rotundus | 1 | |
| Cypripedium calceolus | Accepted | Cypripedium calceolus | 3 | |
| Cyrillopsis paraensis | Accepted | Cyrillopsis paraensis | 1 | |
| Cystopteris alpina | Accepted | Cystopteris alpina | 1 | |
| Cystopteris dickieana | Synonym | Cystopteris fragilis subsp. dickieana | 1 | |
| Cystopteris fragilis | Accepted | Cystopteris fragilis | 3 | |
| Cystopteris fragilis var. dickieana | Synonym | Cystopteris fragilis | 1 | |
| Cystopteris montana | Accepted | Cystopteris montana | 2 | |
| Cystopteris sudetica | Accepted | Cystopteris sudetica | 1 | |
| Cytinus hypocistis | Accepted | Cytinus hypocistis | 1 | |
| Cytisophyllum sessilifolium | Accepted | Cytisophyllum sessilifolium | 1 | |
| Cytisus ardoinoi | Accepted | Cytisus ardoinoi | 1 | |
| Cytisus decumbens | Accepted | Cytisus decumbens | 1 | |
| Cytisus emeriflorus | Accepted | Cytisus emeriflorus | 1 | |
| Cytisus falcatus | Synonym | Chamaecytisus hirsutus subsp. hirsutus | 1 | |
| Cytisus hirsutus | Synonym | Chamaecytisus hirsutus | 1 | |
| Cytisus leucotrichus | Synonym | Chamaecytisus triflorus subsp. triflorus | 1 | |
| Cytisus lotoides | Synonym | Argyrolobium biebersteinii | 1 | |
| Cytisus pseudoprocumbens | Synonym | Cytisus decumbens subsp. pindicola | 1 | |
| Cytisus sauzeanus | Synonym | Cytisus ardoinoi subsp. sauzeanus | 1 | |
| Cytisus scoparius | Accepted | Cytisus scoparius | 1 | |
| Cytisus triflorus | Synonym | Cytisus villosus | 1 | |
| Cytisus villosus | Accepted | Cytisus villosus | 1 | |
| Daboecia cantabrica | Accepted | Daboecia cantabrica | 1 | |
| Dacryodes cuspidata | Accepted | Dacryodes cuspidata | 1 | |
| Dactylis glomerata | Accepted | Dactylis glomerata | 1 | |
| Dactylis glomerata | Accepted | Dactylis glomerata | 1 | |
| Dactylis glomerata subsp. hispanica | Accepted | Dactylis glomerata subsp. hispanica | 1 | |
| Dactylis polygama | Synonym | Dactylis glomerata subsp. lobata | 2 | |
| Dactylorhiza cruenta | Synonym | Dactylorhiza incarnata subsp. cruenta | 1 | |
| Dactylorhiza fuchsii | Accepted | Dactylorhiza fuchsii | 2 | |
| Dactylorhiza incarnata | Accepted | Dactylorhiza incarnata | 1 | |
| Dactylorhiza incarnata | Accepted | Dactylorhiza incarnata | 1 | |
| Dactylorhiza lapponica | Accepted | Dactylorhiza lapponica | 1 | |
| Dactylorhiza maculata | Accepted | Dactylorhiza maculata | 2 | |
| Dactylorhiza majalis | Accepted | Dactylorhiza majalis | 1 | |
| Dactylorhiza sambucina | Accepted | Dactylorhiza sambucina | 2 | |
| Dactylorhiza traunsteineri | Accepted | Dactylorhiza traunsteineri | 1 | |
| Damasonium alisma | Accepted | Damasonium alisma | 1 | |
| Danae racemosa | Accepted | Danae racemosa | 1 | |
| Danthonia alpina | Accepted | Danthonia alpina | 1 | |
| Danthonia decumbens | Accepted | Danthonia decumbens | 2 | |
| Daphne alpina | Accepted | Daphne alpina | 1 | |
| Daphne blagayana | Accepted | Daphne blagayana | 2 | |
| Daphne cneorum | Accepted | Daphne cneorum | 1 | |
| Daphne laureola | Accepted | Daphne laureola | 1 | |
| Daphne mezereum | Accepted | Daphne mezereum | 2 | |
| Daphne petraea | Accepted | Daphne petraea | 1 | |
| Daphne striata | Accepted | Daphne striata | 1 | |
| Darlingtonia californica | Accepted | Darlingtonia californica | 1 | |
| Dasiphora fruticosa | Accepted | Dasiphora fruticosa | 1 | |
| Dasylepis seretii | Accepted | Dasylepis seretii | 1 | |
| Dasypyrum villosum | Accepted | Dasypyrum villosum | 2 | |
| Datisca cannabina | Accepted | Datisca cannabina | 1 | |
| Datura innoxia | Accepted | Datura innoxia | 1 | |
| Datura stramonium | Accepted | Datura stramonium | 1 | |
| Daucus carota | Accepted | Daucus carota | 2 | |
| Decaisnea fargesii | Accepted | Decaisnea fargesii | 1 | |
| Decaryella madagascariensis | Accepted | Decaryella madagascariensis | 1 | |
| Degeneria vitiensis | Accepted | Degeneria vitiensis | 1 | |
| Delphinium chamissonis | Accepted | Delphinium chamissonis | 1 | |
| Delphinium dubium | Accepted | Delphinium dubium | 1 | |
| Delphinium elatum | Accepted | Delphinium elatum | 3 | |
| Delphinium elatum subsp. helveticum | Accepted | Delphinium elatum subsp. helveticum | 1 | |
| Delphinium fissum | Accepted | Delphinium fissum | 1 | |
| Delphinium nacladense | Synonym | Delphinium elatum subsp. nacladense | 1 | |
| Delphinium oxysepalum | Accepted | Delphinium oxysepalum | 1 | |
| Dendrobangia boliviana | Accepted | Dendrobangia boliviana | 1 | |
| Deschampsia beringensis | Synonym | Deschampsia cespitosa subsp. cespitosa | 1 | |
| Deschampsia brevifolia | Synonym | Deschampsia cespitosa subsp. septentrionalis | 1 | |
| Deschampsia cespitosa | Accepted | Deschampsia cespitosa | 2 | |
| Deschampsia cespitosa subsp. borealis | Synonym | Deschampsia cespitosa | 1 | |
| Deschampsia cespitosa var. alpina | Synonym | Deschampsia cespitosa | 3 | |
| Deschampsia media | Accepted | Deschampsia media | 1 | |
| Deschampsia sukatschewii | Synonym | Deschampsia cespitosa subsp. cespitosa | 1 | |
| Descurainia sophia | Accepted | Descurainia sophia | 2 | |
| Desfontainia spinosa | Accepted | Desfontainia spinosa | 1 | |
| Dethawia tenuifolia | Synonym | Dethawia splendens | 1 | |
| Dianthus alpinus | Accepted | Dianthus alpinus | 1 | |
| Dianthus armeria | Accepted | Dianthus armeria | 2 | |
| Dianthus balbisii | Synonym | Dianthus ferrugineus | 1 | |
| Dianthus barbatus | Accepted | Dianthus barbatus | 1 | |
| Dianthus callizonus | Accepted | Dianthus callizonus | 1 | |
| Dianthus carthusianorum | Accepted | Dianthus carthusianorum | 1 | |
| Dianthus carthusianorum subsp. atrorubens | Synonym | Dianthus carthusianorum | 1 | |
| Dianthus carthusianorum subsp. capillifrons | Synonym | Dianthus carthusianorum | 2 | |
| Dianthus carthusianorum subsp. tenuifolius | Synonym | Dianthus carthusianorum | 1 | |
| Dianthus deltoides | Accepted | Dianthus deltoides | 1 | |
| Dianthus furcatus | Accepted | Dianthus furcatus | 1 | |
| Dianthus giganteus subsp. banaticus | Accepted | Dianthus giganteus subsp. banaticus | 1 | |
| Dianthus glacialis | Accepted | Dianthus glacialis | 1 | |
| Dianthus glacialis subsp. gelidus | Accepted | Dianthus glacialis subsp. gelidus | 1 | |
| Dianthus gratianopolitanus | Accepted | Dianthus gratianopolitanus | 1 | |
| Dianthus henteri | Accepted | Dianthus henteri | 1 | |
| Dianthus hyssopifolius | Accepted | Dianthus hyssopifolius | 1 | |
| Dianthus longicaulis | Synonym | Dianthus sylvestris subsp. longicaulis | 1 | |
| Dianthus lumnitzeri | Synonym | Dianthus praecox subsp. lumnitzeri | 1 | |
| Dianthus nitidus | Accepted | Dianthus nitidus | 1 | |
| Dianthus pavonius | Accepted | Dianthus pavonius | 1 | |
| Dianthus petraeus subsp. orbelicus | Accepted | Dianthus petraeus subsp. orbelicus | 1 | |
| Dianthus petraeus subsp. petraeus | Accepted | Dianthus petraeus subsp. petraeus | 1 | |
| Dianthus plumarius | Accepted | Dianthus plumarius | 2 | |
| Dianthus pontederae | Synonym | Dianthus giganteiformis | 1 | |
| Dianthus sanguineus | Synonym | Dianthus carthusianorum | 1 | |
| Dianthus scaber | Synonym | Dianthus chinensis | 1 | |
| Dianthus seguieri | Accepted | Dianthus seguieri | 1 | |
| Dianthus serbicus | Synonym | Dianthus pinifolius subsp. serbicus | 1 | |
| Dianthus spiculifolius | Accepted | Dianthus spiculifolius | 1 | |
| Dianthus sternbergii | Accepted | Dianthus sternbergii | 1 | |
| Dianthus subacaulis | Accepted | Dianthus subacaulis | 1 | |
| Dianthus superbus | Accepted | Dianthus superbus | 1 | |
| Dianthus superbus subsp. alpestris | Accepted | Dianthus superbus subsp. alpestris | 1 | |
| Dianthus sylvestris | Accepted | Dianthus sylvestris | 1 | |
| Dianthus vaginatus | Synonym | Dianthus carthusianorum | 1 | |
| Diapensia lapponica | Accepted | Diapensia lapponica | 1 | |
| Dicentra formosa | Accepted | Dicentra formosa | 1 | |
| Dicentra spectabilis | Synonym | Lamprocapnos spectabilis | 1 | |
| Dichanthium saccharoides | Synonym | Bothriochloa saccharoides | 1 | |
| Dichondra micrantha | Accepted | Dichondra micrantha | 1 | |
| Dicorynia guianensis | Accepted | Dicorynia guianensis | 1 | |
| Dictamnus albus | Accepted | Dictamnus albus | 1 | |
| Diegodendron humbertii | Accepted | Diegodendron humbertii | 1 | |
| Digitalis grandiflora | Accepted | Digitalis grandiflora | 1 | |
| Digitalis lutea | Accepted | Digitalis lutea | 1 | |
| Digitalis purpurea | Accepted | Digitalis purpurea | 1 | |
| Digitaria glauca | Accepted | Digitaria glauca | 1 | |
| Digitaria ischaemum | Accepted | Digitaria ischaemum | 1 | |
| Digitaria sanguinalis | Accepted | Digitaria sanguinalis | 2 | |
| Dioncophyllum peltatum | Unchecked | 1 | ||
| Dioncophyllum thollonii | Accepted | Dioncophyllum thollonii | 1 | |
| Diospyros carbonaria | Accepted | Diospyros carbonaria | 1 | |
| Diospyros lotus | Accepted | Diospyros lotus | 1 | |
| Dipcadi serotinum | Accepted | Dipcadi serotinum | 1 | |
| Diphasiastrum alpinum | Unchecked | 2 | ||
| Diphasiastrum complanatum | Synonym | Lycopodium complanatum | 1 | |
| Diphasiastrum issleri | Unchecked | 1 | ||
| Diphasiastrum montellii | Synonym | Lycopodium complanatum | 1 | |
| Diphasiastrum oellgaardii | Synonym | Lycopodium oellgaardii | 1 | |
| Diphasiastrum tristachyum | Synonym | Lycopodium tristachyum | 1 | |
| Diphasiastrum zeilleri | Synonym | Lycopodium × zeilleri | 1 | |
| Diplazium sibiricum | Accepted | Diplazium sibiricum | 1 | |
| Diplotaxis erucoides | Accepted | Diplotaxis erucoides | 1 | |
| Diplotaxis muralis | Accepted | Diplotaxis muralis | 1 | |
| Diplotaxis tenuifolia | Accepted | Diplotaxis tenuifolia | 1 | |
| Diplotaxis viminea | Accepted | Diplotaxis viminea | 1 | |
| Diplotropis purpurea | Accepted | Diplotropis purpurea | 1 | |
| Dipsacus fullonum | Accepted | Dipsacus fullonum | 1 | |
| Dipsacus laciniatus | Accepted | Dipsacus laciniatus | 1 | |
| Dipsacus pilosus | Accepted | Dipsacus pilosus | 2 | |
| Dipteryx odorata | Accepted | Dipteryx odorata | 1 | |
| Dirachma socotrana | Accepted | Dirachma socotrana | 1 | |
| Discophora guianensis | Accepted | Discophora guianensis | 1 | |
| Dodecatheon frigidum | Synonym | Primula frigida | 1 | |
| Doliocarpus dentatus | Accepted | Doliocarpus dentatus | 1 | |
| Doronicum austriacum | Accepted | Doronicum austriacum | 1 | |
| Doronicum carpaticum | Accepted | Doronicum carpaticum | 1 | |
| Doronicum cataractarum | Accepted | Doronicum cataractarum | 1 | |
| Doronicum clusii subsp. clusii | Synonym | Doronicum clusii | 1 | |
| Doronicum clusii subsp. villosum | Synonym | Doronicum clusii | 1 | |
| Doronicum columnae | Accepted | Doronicum columnae | 2 | |
| Doronicum glaciale | Accepted | Doronicum glaciale | 2 | |
| Doronicum grandiflorum | Accepted | Doronicum grandiflorum | 1 | |
| Doronicum macrophyllum | Accepted | Doronicum macrophyllum | 1 | |
| Doronicum orientale | Synonym | Doronicum columnae | 1 | |
| Doronicum pardalianches | Accepted | Doronicum pardalianches | 2 | |
| Doronicum plantagineum | Accepted | Doronicum plantagineum | 1 | |
| Doryanthes palmeri | Accepted | Doryanthes palmeri | 1 | |
| Dorycnium herbaceum | Synonym | Lotus herbaceus | 1 | |
| Dorycnium hirsutum | Synonym | Lotus hirsutus | 1 | |
| Dorycnium pentaphyllum subsp. germanicum | Synonym | Lotus germanicus | 1 | |
| Dorycnium pentaphyllum subsp. pentaphyllum | Synonym | Lotus dorycnium | 1 | |
| Dorycnium rectum | Synonym | Lotus rectus | 1 | |
| Douglasia alaskana | Synonym | Androsace alaskana | 1 | |
| Douglasia arctica | Synonym | Androsace americana | 1 | |
| Douglasia beringensis | Synonym | Androsace beringensis | 1 | |
| Douglasia gormanii | Synonym | Androsace constancei | 1 | |
| Douglasia idahoensis | Synonym | Androsace idahoensis | 1 | |
| Douglasia ochotensis | Synonym | Androsace ochotensis | 1 | |
| Draba aizoides subsp. aizoides | Synonym | Draba aizoides | 1 | |
| Draba alpina | Accepted | Draba alpina | 1 | |
| Draba arctica | Accepted | Draba arctica | 1 | |
| Draba arctogena | Accepted | Draba arctogena | 1 | |
| Draba aurea | Accepted | Draba aurea | 1 | |
| Draba cacuminum | Accepted | Draba cacuminum | 1 | |
| Draba cana | Accepted | Draba cana | 1 | |
| Draba carinthiaca | Synonym | Draba siliquosa | 1 | |
| Draba cinerea | Accepted | Draba cinerea | 1 | |
| Draba compacta | Accepted | Draba compacta | 1 | |
| Draba corymbosa | Accepted | Draba corymbosa | 1 | |
| Draba crassifolia | Accepted | Draba crassifolia | 1 | |
| Draba dolomitica | Accepted | Draba dolomitica | 1 | |
| Draba dorneri | Accepted | Draba dorneri | 1 | |
| Draba dubia | Accepted | Draba dubia | 1 | |
| Draba fladnizensis | Accepted | Draba fladnizensis | 2 | |
| Draba glacialis | Accepted | Draba glacialis | 1 | |
| Draba glomerata | Accepted | Draba glomerata | 1 | |
| Draba haynaldii | Accepted | Draba haynaldii | 1 | |
| Draba hoppeana | Accepted | Draba hoppeana | 1 | |
| Draba incana | Accepted | Draba incana | 2 | |
| Draba juvenilis | Accepted | Draba juvenilis | 1 | |
| Draba kotschyi | Accepted | Draba kotschyi | 1 | |
| Draba lactea | Accepted | Draba lactea | 1 | |
| Draba ladina | Accepted | Draba ladina | 1 | |
| Draba lasiocarpa | Accepted | Draba lasiocarpa | 1 | |
| Draba lasiophylla | Accepted | Draba lasiophylla | 2 | |
| Draba lichiangensis | Accepted | Draba lichiangensis | 1 | |
| Draba lonchocarpa | Accepted | Draba lonchocarpa | 1 | |
| Draba micropetala | Accepted | Draba micropetala | 1 | |
| Draba muralis | Accepted | Draba muralis | 1 | |
| Draba nemorosa | Accepted | Draba nemorosa | 1 | |
| Draba nivalis | Accepted | Draba nivalis | 1 | |
| Draba norvegica | Accepted | Draba norvegica | 2 | |
| Draba norvegica | Accepted | Draba norvegica | 1 | |
| Draba oblongata | Accepted | Draba oblongata | 1 | |
| Draba oreades | Accepted | Draba oreades | 5 | |
| Draba pacheri | Accepted | Draba pacheri | 1 | |
| Draba palanderiana | Accepted | Draba palanderiana | 1 | |
| Draba pauciflora | Accepted | Draba pauciflora | 1 | |
| Draba sauteri | Accepted | Draba sauteri | 1 | |
| Draba sibirica | Accepted | Draba sibirica | 1 | |
| Draba siliquosa | Accepted | Draba siliquosa | 2 | |
| Draba stellata | Accepted | Draba stellata | 1 | |
| Draba subcapitata | Accepted | Draba subcapitata | 1 | |
| Draba thomasii | Synonym | Draba stylaris | 1 | |
| Draba tomentosa | Accepted | Draba tomentosa | 1 | |
| Draba verna | Accepted | Draba verna | 2 | |
| Drabella muralis | Synonym | Draba muralis | 1 | |
| Dracocephalum austriacum | Accepted | Dracocephalum austriacum | 1 | |
| Dracocephalum ruyschiana | Accepted | Dracocephalum ruyschiana | 1 | |
| Dracocephalum thymiflorum | Accepted | Dracocephalum thymiflorum | 1 | |
| Drimys winteri | Accepted | Drimys winteri | 1 | |
| Drosera anglica | Accepted | Drosera anglica | 1 | |
| Drosera intermedia | Accepted | Drosera intermedia | 2 | |
| Drosera longifolia | Synonym | Drosera anglica | 2 | |
| Drosera × obovata | Accepted | Drosera × obovata | 1 | |
| Drosera rotundifolia | Accepted | Drosera rotundifolia | 3 | |
| Drosophyllum lusitanicum | Accepted | Drosophyllum lusitanicum | 1 | |
| Dryas ajanensis | Accepted | Dryas ajanensis | 1 | |
| Dryas drummondii | Accepted | Dryas drummondii | 1 | |
| Dryas integrifolia | Accepted | Dryas integrifolia | 1 | |
| Dryas integrifolia subsp. integrifolia | Synonym | Dryas integrifolia | 1 | |
| Dryas octopetala | Accepted | Dryas octopetala | 3 | |
| Dryas octopetala subsp. alaskensis | Accepted | Dryas octopetala subsp. alaskensis | 1 | |
| Dryopteris affinis | Synonym | Cyclodium heterodon var. abbreviatum | 1 | |
| Dryopteris carthusiana | Accepted | Dryopteris carthusiana | 2 | |
| Dryopteris cristata | Accepted | Dryopteris cristata | 2 | |
| Dryopteris dilatata | Accepted | Dryopteris dilatata | 2 | |
| Dryopteris expansa | Accepted | Dryopteris expansa | 2 | |
| Dryopteris filix-mas | Accepted | Dryopteris filix-mas | 2 | |
| Dryopteris fragrans | Accepted | Dryopteris fragrans | 1 | |
| Dryopteris remota | Accepted | Dryopteris remota | 1 | |
| Dryopteris submontana | Synonym | Dryopteris mindshelkensis | 1 | |
| Dryopteris tyrrhena | Accepted | Dryopteris tyrrhena | 1 | |
| Dryopteris villarii | Accepted | Dryopteris villarii | 1 | |
| Drypetes variabilis | Accepted | Drypetes variabilis | 1 | |
| Drypis spinosa subsp. jacquiniana | Accepted | Drypis spinosa subsp. jacquiniana | 2 | |
| Duchesnea indica | Accepted | Duchesnea indica | 1 | |
| Duguetia surinamensis | Accepted | Duguetia surinamensis | 1 | |
| Dupontia fisheri | Accepted | Dupontia fisheri | 1 | |
| Dupontia fisheri subsp. pelligera | Synonym | Dupontia fisheri | 1 | |
| Dussia discolor | Accepted | Dussia discolor | 1 | |
| Ecballium elaterium | Accepted | Ecballium elaterium | 1 | |
| Ecclinusa lanceolata | Accepted | Ecclinusa lanceolata | 1 | |
| Ecclinusa ramiflora | Accepted | Ecclinusa ramiflora | 1 | |
| Echinaria capitata | Accepted | Echinaria capitata | 1 | |
| Echinochloa crus-galli | Accepted | Echinochloa crus-galli | 2 | |
| Echinochloa muricata subsp. microstachya | Synonym | Echinochloa muricata | 1 | |
| Echinochloa stagnina | Accepted | Echinochloa stagnina | 1 | |
| Echinocystis lobata | Accepted | Echinocystis lobata | 1 | |
| Echinops bannaticus | Accepted | Echinops bannaticus | 1 | |
| Echinops exaltatus | Accepted | Echinops exaltatus | 2 | |
| Echinops ritro | Accepted | Echinops ritro | 1 | |
| Echinops sphaerocephalus | Accepted | Echinops sphaerocephalus | 2 | |
| Echinospartum horridum | Accepted | Echinospartum horridum | 1 | |
| Echium asperrimum | Accepted | Echium asperrimum | 1 | |
| Echium vulgare | Accepted | Echium vulgare | 1 | |
| Edraianthus graminifolius | Accepted | Edraianthus graminifolius | 1 | |
| Elaeagnus pungens | Accepted | Elaeagnus pungens | 1 | |
| Elatine alsinastrum | Accepted | Elatine alsinastrum | 1 | |
| Elatine hexandra | Accepted | Elatine hexandra | 1 | |
| Elatine hydropiper | Accepted | Elatine hydropiper | 2 | |
| Eleocharis acicularis | Accepted | Eleocharis acicularis | 2 | |
| Eleocharis austriaca | Synonym | Eleocharis mamillata subsp. austriaca | 2 | |
| Eleocharis mamillata | Accepted | Eleocharis mamillata | 2 | |
| Eleocharis multicaulis | Accepted | Eleocharis multicaulis | 1 | |
| Eleocharis ovata | Accepted | Eleocharis ovata | 1 | |
| Eleocharis palustris | Accepted | Eleocharis palustris | 1 | |
| Eleocharis palustris | Accepted | Eleocharis palustris | 1 | |
| Eleocharis palustris subsp. waltersii | Accepted | Eleocharis palustris subsp. waltersii | 1 | |
| Eleocharis quinqueflora | Accepted | Eleocharis quinqueflora | 3 | |
| Eleocharis uniglumis | Accepted | Eleocharis uniglumis | 2 | |
| Eleusine indica | Accepted | Eleusine indica | 1 | |
| Elodea canadensis | Accepted | Elodea canadensis | 2 | |
| Elodea nuttallii | Accepted | Elodea nuttallii | 1 | |
| Elymus alaskanus | Accepted | Elymus alaskanus | 2 | |
| Elymus alaskanus subsp. borealis | Synonym | Elymus macrourus | 1 | |
| Elymus athericus | Accepted | Elymus athericus | 1 | |
| Elymus caninus | Accepted | Elymus caninus | 4 | |
| Elymus caninus var. muticus | Synonym | Elymus caninus | 1 | |
| Elymus fibrosus | Accepted | Elymus fibrosus | 1 | |
| Elymus hispidus | Accepted | Elymus hispidus | 1 | |
| Elymus macrourus | Accepted | Elymus macrourus | 1 | |
| Elymus mutabilis | Accepted | Elymus mutabilis | 1 | |
| Elymus repens | Accepted | Elymus repens | 1 | |
| Elymus sajanensis subsp. hyperarcticus | Synonym | Elymus sajanensis | 1 | |
| Elymus sibiricus | Accepted | Elymus sibiricus | 1 | |
| Elymus trachycaulus subsp. virescens | Synonym | Elymus violaceus | 1 | |
| Elyna myosuroides | Synonym | Carex myosuroides | 1 | |
| Elytrigia repens | Synonym | Elymus repens | 1 | |
| Emblingia calceoliflora | Accepted | Emblingia calceoliflora | 1 | |
| Empetrum nigrum | Accepted | Empetrum nigrum | 2 | |
| Empetrum nigrum subsp. hermaphroditum | Accepted | Empetrum nigrum subsp. hermaphroditum | 2 | |
| Endlicheria melinonii | Accepted | Endlicheria melinonii | 2 | |
| Endlicheria paniculata | Accepted | Endlicheria paniculata | 4 | |
| Endlicheria paniculata | Accepted | Endlicheria paniculata | 1 | |
| Endressia castellana | Accepted | Endressia castellana | 1 | |
| Enterolobium schomburgkii | Accepted | Enterolobium schomburgkii | 1 | |
| Eperua falcata | Accepted | Eperua falcata | 1 | |
| Ephedra helvetica | Synonym | Ephedra distachya subsp. helvetica | 5 | |
| Ephedra nebrodensis | Synonym | Ephedra major | 1 | |
| Epilobium alpestre | Accepted | Epilobium alpestre | 1 | |
| Epilobium alsinifolium | Accepted | Epilobium alsinifolium | 1 | |
| Epilobium anagallidifolium | Accepted | Epilobium anagallidifolium | 1 | |
| Epilobium angustifolium | Accepted | Epilobium angustifolium | 1 | |
| Epilobium ciliatum | Accepted | Epilobium ciliatum | 2 | |
| Epilobium collinum | Accepted | Epilobium collinum | 1 | |
| Epilobium dodonaei | Accepted | Epilobium dodonaei | 2 | |
| Epilobium duriaei | Accepted | Epilobium duriaei | 1 | |
| Epilobium fleischeri | Accepted | Epilobium fleischeri | 1 | |
| Epilobium hirsutum | Accepted | Epilobium hirsutum | 1 | |
| Epilobium hornemannii | Accepted | Epilobium hornemannii | 1 | |
| Epilobium laestadii | Synonym | Epilobium palustre | 1 | |
| Epilobium lanceolatum | Accepted | Epilobium lanceolatum | 1 | |
| Epilobium leptocarpum | Accepted | Epilobium leptocarpum | 1 | |
| Epilobium montanum | Accepted | Epilobium montanum | 1 | |
| Epilobium nutans | Accepted | Epilobium nutans | 1 | |
| Epilobium obscurum | Accepted | Epilobium obscurum | 1 | |
| Epilobium palustre | Accepted | Epilobium palustre | 2 | |
| Epilobium parviflorum | Accepted | Epilobium parviflorum | 3 | |
| Epilobium roseum | Accepted | Epilobium roseum | 1 | |
| Epilobium tetragonum subsp. lamyi | Accepted | Epilobium tetragonum subsp. lamyi | 1 | |
| Epilobium tetragonum subsp. tetragonum | Synonym | Epilobium tetragonum | 1 | |
| Epimedium alpinum | Accepted | Epimedium alpinum | 2 | |
| Epipactis atrorubens | Accepted | Epipactis atrorubens | 2 | |
| Epipactis fibri | Synonym | Epipactis albensis var. fibri | 1 | |
| Epipactis greuteri | Accepted | Epipactis greuteri | 1 | |
| Epipactis helleborine | Accepted | Epipactis helleborine | 3 | |
| Epipactis helleborine subsp. tremolsii | Synonym | Epipactis tremolsii | 1 | |
| Epipactis leptochila | Accepted | Epipactis leptochila | 1 | |
| Epipactis microphylla | Accepted | Epipactis microphylla | 1 | |
| Epipactis muelleri | Accepted | Epipactis muelleri | 1 | |
| Epipactis palustris | Accepted | Epipactis palustris | 2 | |
| Epipactis rhodanensis | Synonym | Epipactis bugacensis subsp. rhodanensis | 1 | |
| Epipactis viridiflora | Synonym | Epipactis helleborine | 1 | |
| Epipogium aphyllum | Accepted | Epipogium aphyllum | 1 | |
| Equisetum arvense | Accepted | Equisetum arvense | 1 | |
| Equisetum arvense | Accepted | Equisetum arvense | 2 | |
| Equisetum fluviatile | Accepted | Equisetum fluviatile | 2 | |
| Equisetum hyemale | Accepted | Equisetum hyemale | 2 | |
| Equisetum palustre | Accepted | Equisetum palustre | 2 | |
| Equisetum pratense | Accepted | Equisetum pratense | 2 | |
| Equisetum ramosissimum | Accepted | Equisetum ramosissimum | 1 | |
| Equisetum scirpoides | Accepted | Equisetum scirpoides | 1 | |
| Equisetum sylvaticum | Accepted | Equisetum sylvaticum | 2 | |
| Equisetum telmateia | Accepted | Equisetum telmateia | 2 | |
| Equisetum variegatum | Accepted | Equisetum variegatum | 2 | |
| Eragrostis barrelieri | Accepted | Eragrostis barrelieri | 1 | |
| Eragrostis cilianensis | Accepted | Eragrostis cilianensis | 1 | |
| Eragrostis minor | Accepted | Eragrostis minor | 1 | |
| Eragrostis multicaulis | Accepted | Eragrostis multicaulis | 1 | |
| Eragrostis pectinacea | Accepted | Eragrostis pectinacea | 1 | |
| Eragrostis pilosa | Accepted | Eragrostis pilosa | 1 | |
| Eragrostis virescens | Accepted | Eragrostis virescens | 1 | |
| Eranthis hyemalis | Accepted | Eranthis hyemalis | 1 | |
| Erechtites hieraciifolia | Accepted | Erechtites hieraciifolia | 1 | |
| Erica arborea | Accepted | Erica arborea | 1 | |
| Erica carnea | Synonym | Erica herbacea | 1 | |
| Erica cinerea | Accepted | Erica cinerea | 1 | |
| Erica scoparia | Accepted | Erica scoparia | 1 | |
| Erica spiculifolia | Accepted | Erica spiculifolia | 1 | |
| Erica tetralix | Accepted | Erica tetralix | 1 | |
| Erigeron acer | Unchecked | 3 | ||
| Erigeron acris | Accepted | Erigeron acris | 1 | |
| Erigeron alpinus | Accepted | Erigeron alpinus | 1 | |
| Erigeron annuus | Accepted | Erigeron annuus | 2 | |
| Erigeron atticus | Accepted | Erigeron atticus | 2 | |
| Erigeron borealis | Accepted | Erigeron borealis | 2 | |
| Erigeron candidus | Synonym | Erigeron glabratus subsp. candidus | 1 | |
| Erigeron compositus | Accepted | Erigeron compositus | 1 | |
| Erigeron elatus | Accepted | Erigeron elatus | 1 | |
| Erigeron elongatus | Synonym | Erigeron acris subsp. politus | 1 | |
| Erigeron gaudinii | Synonym | Erigeron schleicheri | 1 | |
| Erigeron glabratus | Accepted | Erigeron glabratus | 1 | |
| Erigeron humilis | Accepted | Erigeron humilis | 1 | |
| Erigeron hungaricus | Accepted | Erigeron hungaricus | 1 | |
| Erigeron hyperboreus | Accepted | Erigeron hyperboreus | 1 | |
| Erigeron karvinskianus | Accepted | Erigeron karvinskianus | 1 | |
| Erigeron muirii | Accepted | Erigeron muirii | 1 | |
| Erigeron neglectus | Accepted | Erigeron neglectus | 2 | |
| Erigeron peregrinus | Accepted | Erigeron peregrinus | 1 | |
| Erigeron purpuratus | Accepted | Erigeron purpuratus | 1 | |
| Erigeron silenifolius | Accepted | Erigeron silenifolius | 1 | |
| Erigeron uniflorus | Accepted | Erigeron uniflorus | 2 | |
| Erigeron uniflorus var. eriocephalus | Unchecked | 1 | ||
| Erinacea anthyllis | Accepted | Erinacea anthyllis | 1 | |
| Erinus alpinus | Accepted | Erinus alpinus | 1 | |
| Eriobotrya japonica | Accepted | Eriobotrya japonica | 1 | |
| Eriophorum angustifolium | Accepted | Eriophorum angustifolium | 2 | |
| Eriophorum angustifolium | Accepted | Eriophorum angustifolium | 1 | |
| Eriophorum angustifolium | Accepted | Eriophorum angustifolium | 1 | |
| Eriophorum brachyantherum | Accepted | Eriophorum brachyantherum | 1 | |
| Eriophorum callitrix | Accepted | Eriophorum callitrix | 1 | |
| Eriophorum gracile | Accepted | Eriophorum gracile | 1 | |
| Eriophorum latifolium | Accepted | Eriophorum latifolium | 2 | |
| Eriophorum russeolum | Synonym | Eriophorum chamissonis | 1 | |
| Eriophorum scheuchzeri | Accepted | Eriophorum scheuchzeri | 1 | |
| Eriophorum scheuchzeri | Accepted | Eriophorum scheuchzeri | 1 | |
| Eriophorum scheuchzeri subsp. arcticum | Synonym | Eriophorum scheuchzeri | 1 | |
| Eriophorum vaginatum | Accepted | Eriophorum vaginatum | 2 | |
| Erismadelphus exsul | Accepted | Erismadelphus exsul | 1 | |
| Erisma uncinatum | Accepted | Erisma uncinatum | 1 | |
| Eritrichium aretioides | Accepted | Eritrichium aretioides | 1 | |
| Eritrichium nanum | Accepted | Eritrichium nanum | 6 | |
| Eritrichium nanum subsp. jankae | Accepted | Eritrichium nanum subsp. jankae | 1 | |
| Erodium acaule | Accepted | Erodium acaule | 1 | |
| Erodium ciconium | Accepted | Erodium ciconium | 1 | |
| Erodium cicutarium | Accepted | Erodium cicutarium | 2 | |
| Erodium malacoides | Accepted | Erodium malacoides | 1 | |
| Erodium moschatum | Accepted | Erodium moschatum | 1 | |
| Erodium pilosum | Synonym | Erodium cicutarium | 1 | |
| Erodium rodiei | Accepted | Erodium rodiei | 1 | |
| Eruca sativa | Synonym | Eruca vesicaria | 1 | |
| Erucastrum gallicum | Accepted | Erucastrum gallicum | 1 | |
| Erucastrum nasturtiifolium | Accepted | Erucastrum nasturtiifolium | 1 | |
| Eryngium alpinum | Accepted | Eryngium alpinum | 1 | |
| Eryngium amethystinum | Accepted | Eryngium amethystinum | 1 | |
| Eryngium campestre | Accepted | Eryngium campestre | 1 | |
| Eryngium maritimum | Accepted | Eryngium maritimum | 1 | |
| Eryngium spinalba | Accepted | Eryngium spinalba | 1 | |
| Erysimum | Accepted | Erysimum | 1 | |
| Erysimum andrzejowskianum | Accepted | Erysimum andrzejowskianum | 1 | |
| Erysimum burnatii | Accepted | Erysimum burnatii | 1 | |
| Erysimum cheiranthoides | Accepted | Erysimum cheiranthoides | 2 | |
| Erysimum cheiri | Accepted | Erysimum cheiri | 1 | |
| Erysimum collisparsum | Accepted | Erysimum collisparsum | 1 | |
| Erysimum commatum | Accepted | Erysimum commatum | 1 | |
| Erysimum inconspicuum | Accepted | Erysimum inconspicuum | 1 | |
| Erysimum jugicola | Accepted | Erysimum jugicola | 1 | |
| Erysimum ochroleucum | Accepted | Erysimum ochroleucum | 1 | |
| Erysimum odoratum | Accepted | Erysimum odoratum | 1 | |
| Erysimum pallasii | Synonym | Erysimum redowskii | 1 | |
| Erysimum pieninicum | Synonym | Erysimum hungaricum | 1 | |
| Erysimum repandum | Accepted | Erysimum repandum | 2 | |
| Erysimum rhaeticum | Accepted | Erysimum rhaeticum | 1 | |
| Erysimum sylvestre | Accepted | Erysimum sylvestre | 1 | |
| Erysimum virgatum | Accepted | Erysimum virgatum | 2 | |
| Erysimum wahlenbergii | Synonym | Erysimum hungaricum | 1 | |
| Erysimum witmannii | Accepted | Erysimum witmannii | 1 | |
| Erysimum witmannii subsp. transsilvanicum | Synonym | Erysimum witmannii | 1 | |
| Erythronium dens-canis | Accepted | Erythronium dens-canis | 1 | |
| Erythroxylum ambiguum | Synonym | Erythroxylum frangulifolium | 1 | |
| Erythroxylum cuneifolium | Accepted | Erythroxylum cuneifolium | 1 | |
| Erythroxylum cuspidifolium | Accepted | Erythroxylum cuspidifolium | 1 | |
| Erythroxylum deciduum | Accepted | Erythroxylum deciduum | 1 | |
| Erythroxylum suberosum | Accepted | Erythroxylum suberosum | 1 | |
| Escallonia alpina | Accepted | Escallonia alpina | 1 | |
| Eschscholzia californica | Accepted | Eschscholzia californica | 1 | |
| Eschweilera congestiflora | Accepted | Eschweilera congestiflora | 1 | |
| Eschweilera coriacea | Accepted | Eschweilera coriacea | 2 | |
| Eschweilera grandiflora | Accepted | Eschweilera grandiflora | 1 | |
| Eschweilera micrantha | Accepted | Eschweilera micrantha | 1 | |
| Eschweilera parviflora | Accepted | Eschweilera parviflora | 1 | |
| Eschweilera sagotiana | Accepted | Eschweilera sagotiana | 1 | |
| Esenbeckia grandiflora | Accepted | Esenbeckia grandiflora | 1 | |
| Esenbeckia leiocarpa | Accepted | Esenbeckia leiocarpa | 3 | |
| Euclidium syriacum | Accepted | Euclidium syriacum | 1 | |
| Euclidium tenuissimum | Synonym | Litwinowia tenuissima | 1 | |
| Eucommia ulmoides | Accepted | Eucommia ulmoides | 1 | |
| Eugenia aurata | Accepted | Eugenia aurata | 1 | |
| Eugenia beaurepairiana | Synonym | Eugenia ternatifolia | 1 | |
| Eugenia bocainensis | Synonym | Eugenia puberula | 1 | |
| Eugenia brevistyla | Synonym | Eugenia tenuipedunculata | 1 | |
| Eugenia burkartiana | Accepted | Eugenia burkartiana | 1 | |
| Eugenia capitulifera | Synonym | Eugenia viridiflora | 1 | |
| Eugenia cereja | Accepted | Eugenia cereja | 1 | |
| Eugenia cuprea | Synonym | Syzygium antisepticum | 1 | |
| Eugenia florida | Accepted | Eugenia florida | 1 | |
| Eugenia longipedunculata | Synonym | Eugenia blastantha | 1 | |
| Eugenia melanogyna | Accepted | Eugenia melanogyna | 1 | |
| Eugenia moraviana | Synonym | Eugenia modesta | 1 | |
| Eugenia mosenii | Accepted | Eugenia mosenii | 1 | |
| Eugenia myrcianthes | Accepted | Eugenia myrcianthes | 1 | |
| Eugenia neoglomerata | Synonym | Eugenia subglomerata | 1 | |
| Eugenia neoverrucosa | Accepted | Eugenia neoverrucosa | 1 | |
| Eugenia oblongata | Synonym | Eugenia platysema | 1 | |
| Eugenia platysema | Accepted | Eugenia platysema | 1 | |
| Eugenia pluriflora | Accepted | Eugenia pluriflora | 1 | |
| Eugenia prasina | Accepted | Eugenia prasina | 1 | |
| Eugenia ramboi | Accepted | Eugenia ramboi | 1 | |
| Eugenia stigmatosa | Accepted | Eugenia stigmatosa | 1 | |
| Eugenia subavenia | Accepted | Eugenia subavenia | 1 | |
| Eugenia subterminalis | Accepted | Eugenia subterminalis | 1 | |
| Eugenia sulcata | Accepted | Eugenia sulcata | 1 | |
| Eugenia supraaxillaris | Accepted | Eugenia supraaxillaris | 1 | |
| Eugenia uniflora | Accepted | Eugenia uniflora | 1 | |
| Eugenia verticillata | Accepted | Eugenia verticillata | 1 | |
| Eugenia verticillata | Accepted | Eugenia verticillata | 1 | |
| Eugenia xiriricana | Accepted | Eugenia xiriricana | 1 | |
| Euonymus europaeus | Accepted | Euonymus europaeus | 1 | |
| Euonymus latifolius | Accepted | Euonymus latifolius | 1 | |
| Euonymus nanus | Accepted | Euonymus nanus | 1 | |
| Euonymus verrucosus | Accepted | Euonymus verrucosus | 1 | |
| Eupatorium cannabinum | Accepted | Eupatorium cannabinum | 1 | |
| Euphorbia amygdaloides | Accepted | Euphorbia amygdaloides | 1 | |
| Euphorbia austriaca | Accepted | Euphorbia austriaca | 1 | |
| Euphorbia carniolica | Accepted | Euphorbia carniolica | 1 | |
| Euphorbia carpatica | Accepted | Euphorbia carpatica | 1 | |
| Euphorbia chamaesyce | Accepted | Euphorbia chamaesyce | 1 | |
| Euphorbia characias | Accepted | Euphorbia characias | 1 | |
| Euphorbia cyparissias | Accepted | Euphorbia cyparissias | 2 | |
| Euphorbia davidii | Accepted | Euphorbia davidii | 1 | |
| Euphorbia dulcis | Accepted | Euphorbia dulcis | 1 | |
| Euphorbia epithymoides | Accepted | Euphorbia epithymoides | 1 | |
| Euphorbia esula | Accepted | Euphorbia esula | 1 | |
| Euphorbia esula subsp. saratoi | Synonym | Euphorbia esula subsp. tommasiniana | 1 | |
| Euphorbia exigua | Accepted | Euphorbia exigua | 1 | |
| Euphorbia falcata | Accepted | Euphorbia falcata | 1 | |
| Euphorbia flavicoma | Accepted | Euphorbia flavicoma | 1 | |
| Euphorbia graminifolia | Accepted | Euphorbia graminifolia | 1 | |
| Euphorbia helioscopia | Accepted | Euphorbia helioscopia | 2 | |
| Euphorbia humifusa | Accepted | Euphorbia humifusa | 1 | |
| Euphorbia hyberna subsp. canuti | Synonym | Euphorbia canuti | 1 | |
| Euphorbia lathyris | Accepted | Euphorbia lathyris | 1 | |
| Euphorbia maculata | Accepted | Euphorbia maculata | 1 | |
| Euphorbia myrsinites | Accepted | Euphorbia myrsinites | 1 | |
| Euphorbia nicaeensis | Accepted | Euphorbia nicaeensis | 1 | |
| Euphorbia nutans | Accepted | Euphorbia nutans | 1 | |
| Euphorbia palustris | Accepted | Euphorbia palustris | 2 | |
| Euphorbia peplus | Accepted | Euphorbia peplus | 1 | |
| Euphorbia platyphyllos | Accepted | Euphorbia platyphyllos | 1 | |
| Euphorbia prostrata | Accepted | Euphorbia prostrata | 1 | |
| Euphorbia saxatilis | Accepted | Euphorbia saxatilis | 1 | |
| Euphorbia segetalis | Accepted | Euphorbia segetalis | 1 | |
| Euphorbia seguieriana | Accepted | Euphorbia seguieriana | 2 | |
| Euphorbia seguieriana subsp. loiseleurii | Synonym | Euphorbia seguieriana subsp. seguieriana | 1 | |
| Euphorbia serrata | Accepted | Euphorbia serrata | 1 | |
| Euphorbia sojakii | Accepted | Euphorbia sojakii | 1 | |
| Euphorbia spinosa | Accepted | Euphorbia spinosa | 1 | |
| Euphorbia stricta | Accepted | Euphorbia stricta | 1 | |
| Euphorbia sulcata | Accepted | Euphorbia sulcata | 1 | |
| Euphorbia taurinensis | Accepted | Euphorbia taurinensis | 1 | |
| Euphorbia triflora subsp. kerneri | Synonym | Euphorbia kerneri | 1 | |
| Euphorbia variabilis | Accepted | Euphorbia variabilis | 1 | |
| Euphorbia verrucosa | Accepted | Euphorbia verrucosa | 1 | |
| Euphorbia villosa | Synonym | Euphorbia illirica | 1 | |
| Euphorbia virgata | Accepted | Euphorbia virgata | 1 | |
| Euphrasia alpina | Synonym | Bartsia alpina | 2 | |
| Euphrasia arctica | Accepted | Euphrasia arctica | 1 | |
| Euphrasia christii | Unchecked | 1 | ||
| Euphrasia cisalpina | Accepted | Euphrasia cisalpina | 1 | |
| Euphrasia cuspidata | Accepted | Euphrasia cuspidata | 1 | |
| Euphrasia frigida | Accepted | Euphrasia frigida | 1 | |
| Euphrasia hirtella | Accepted | Euphrasia hirtella | 1 | |
| Euphrasia hyperborea | Accepted | Euphrasia hyperborea | 1 | |
| Euphrasia kerneri | Synonym | Euphrasia picta | 1 | |
| Euphrasia micrantha | Accepted | Euphrasia micrantha | 1 | |
| Euphrasia minima | Unchecked | 1 | ||
| Euphrasia nemorosa | Accepted | Euphrasia nemorosa | 1 | |
| Euphrasia officinalis subsp. monticola | Accepted | Euphrasia officinalis subsp. monticola | 1 | |
| Euphrasia pectinata | Accepted | Euphrasia pectinata | 1 | |
| Euphrasia picta subsp. arguta | Synonym | Euphrasia picta | 1 | |
| Euphrasia picta subsp. picta | Unchecked | 1 | ||
| Euphrasia rostkoviana subsp. rostkoviana | Unchecked | 1 | ||
| Euphrasia salisburgensis | Accepted | Euphrasia salisburgensis | 2 | |
| Euphrasia scottica | Accepted | Euphrasia scottica | 1 | |
| Euphrasia stricta | Accepted | Euphrasia stricta | 1 | |
| Euphrasia stricta | Accepted | Euphrasia stricta | 1 | |
| Euphrasia versicolor | Unchecked | 1 | ||
| Euphrasia wettsteinii | Accepted | Euphrasia wettsteinii | 1 | |
| Euphronia acuminatissima | Accepted | Euphronia acuminatissima | 1 | |
| Eupomatia bennettii | Accepted | Eupomatia bennettii | 1 | |
| Eupomatia laurina | Accepted | Eupomatia laurina | 1 | |
| Eurybia sibirica | Accepted | Eurybia sibirica | 1 | |
| Euterpe oleracea | Accepted | Euterpe oleracea | 1 | |
| Eutrema edwardsii | Accepted | Eutrema edwardsii | 1 | |
| Fagopyrum esculentum | Accepted | Fagopyrum esculentum | 2 | |
| Fagus sylvatica | Accepted | Fagus sylvatica | 1 | |
| Faidherbia albida | Accepted | Faidherbia albida | 1 | |
| Falcaria vulgaris | Accepted | Falcaria vulgaris | 1 | |
| Fallopia aubertii | Accepted | Fallopia aubertii | 1 | |
| Fallopia baldschuanica | Accepted | Fallopia baldschuanica | 1 | |
| Fallopia convolvulus | Accepted | Fallopia convolvulus | 2 | |
| Fallopia dumetorum | Accepted | Fallopia dumetorum | 1 | |
| Fallopia japonica | Synonym | Reynoutria japonica | 1 | |
| Fallopia sachalinensis | Unchecked | 1 | ||
| Ferula communis | Accepted | Ferula communis | 1 | |
| Ferulago campestris | Synonym | Ferulago galbanifera | 1 | |
| Festuca acuminata | Accepted | Festuca acuminata | 1 | |
| Festuca airoides | Accepted | Festuca airoides | 1 | |
| Festuca alpestris | Accepted | Festuca alpestris | 1 | |
| Festuca alpina | Accepted | Festuca alpina | 1 | |
| Festuca alpina subsp. riverae | Synonym | Festuca alpina | 1 | |
| Festuca altaica | Accepted | Festuca altaica | 1 | |
| Festuca altissima | Accepted | Festuca altissima | 2 | |
| Festuca amethystina | Accepted | Festuca amethystina | 1 | |
| Festuca arundinacea subsp. arundinacea | Synonym | Festuca arundinacea | 2 | |
| Festuca arundinacea subsp. uechtritziana | Synonym | Festuca arundinacea | 1 | |
| Festuca baffinensis | Accepted | Festuca baffinensis | 1 | |
| Festuca brachyphylla | Accepted | Festuca brachyphylla | 1 | |
| Festuca breistrofferi | Accepted | Festuca breistrofferi | 2 | |
| Festuca brevipila | Synonym | Festuca trachyphylla | 1 | |
| Festuca calva | Accepted | Festuca calva | 1 | |
| Festuca carpatica | Accepted | Festuca carpatica | 1 | |
| Festuca cinerea | Accepted | Festuca cinerea | 1 | |
| Festuca circummediterranea | Accepted | Festuca circummediterranea | 1 | |
| Festuca dimorpha | Accepted | Festuca dimorpha | 2 | |
| Festuca drymeja | Accepted | Festuca drymeja | 1 | |
| Festuca edlundiae | Accepted | Festuca edlundiae | 2 | |
| Festuca filiformis | Accepted | Festuca filiformis | 1 | |
| Festuca flavescens | Accepted | Festuca flavescens | 1 | |
| Festuca gigantea | Accepted | Festuca gigantea | 2 | |
| Festuca gracilior | Accepted | Festuca gracilior | 1 | |
| Festuca halleri subsp. halleri | Unchecked | 2 | ||
| Festuca hervieri | Synonym | Festuca marginata | 1 | |
| Festuca heterophylla | Accepted | Festuca heterophylla | 1 | |
| Festuca hyperborea | Accepted | Festuca hyperborea | 1 | |
| Festuca laevigata | Accepted | Festuca laevigata | 1 | |
| Festuca laevigata subsp. crassifolia | Synonym | Festuca laevigata | 1 | |
| Festuca laxa | Accepted | Festuca laxa | 1 | |
| Festuca melanopsis | Synonym | Festuca violacea | 1 | |
| Festuca nigrescens | Accepted | Festuca nigrescens | 1 | |
| Festuca nitida | Accepted | Festuca nitida | 1 | |
| Festuca norica | Accepted | Festuca norica | 1 | |
| Festuca ovina | Accepted | Festuca ovina | 1 | |
| Festuca pallens | Accepted | Festuca pallens | 1 | |
| Festuca paniculata | Accepted | Festuca paniculata | 1 | |
| Festuca patzkei | Accepted | Festuca patzkei | 1 | |
| Festuca pratensis | Accepted | Festuca pratensis | 3 | |
| Festuca prolifera | Accepted | Festuca prolifera | 1 | |
| Festuca pulchella | Accepted | Festuca pulchella | 1 | |
| Festuca pulchella var. jurana | Synonym | Festuca pulchella | 1 | |
| Festuca quadriflora | Accepted | Festuca quadriflora | 1 | |
| Festuca richardsonii | Accepted | Festuca richardsonii | 1 | |
| Festuca rivularis | Accepted | Festuca rivularis | 1 | |
| Festuca rubra | Accepted | Festuca rubra | 2 | |
| Festuca rubra subsp. richardsonii | Synonym | Festuca richardsonii | 1 | |
| Festuca rubra subsp. rubra | Synonym | Festuca rubra | 1 | |
| Festuca rupicaprina | Accepted | Festuca rupicaprina | 1 | |
| Festuca rupicola subsp. saxatilis | Synonym | Festuca rupicola | 1 | |
| Festuca saximontana | Accepted | Festuca saximontana | 1 | |
| Festuca scabriculmis | Accepted | Festuca scabriculmis | 1 | |
| Festuca spectabilis | Accepted | Festuca spectabilis | 1 | |
| Festuca stricta | Accepted | Festuca stricta | 1 | |
| Festuca tatrae | Accepted | Festuca tatrae | 1 | |
| Festuca ticinensis | Accepted | Festuca ticinensis | 1 | |
| Festuca trachyphylla | Accepted | Festuca trachyphylla | 1 | |
| Festuca trichophylla | Accepted | Festuca trichophylla | 1 | |
| Festuca valesiaca subsp. valesiaca | Synonym | Festuca valesiaca | 1 | |
| Festuca varia | Accepted | Festuca varia | 2 | |
| Festuca varia | Accepted | Festuca varia | 1 | |
| Festuca violacea | Accepted | Festuca violacea | 1 | |
| Festuca vivipara | Accepted | Festuca vivipara | 1 | |
| Festuca viviparoidea | Accepted | Festuca viviparoidea | 1 | |
| Festulolium × loliaceum | Accepted | Festulolium × loliaceum | 1 | |
| Fibigia clypeata | Accepted | Fibigia clypeata | 1 | |
| Ficalhoa laurifolia | Accepted | Ficalhoa laurifolia | 1 | |
| Ficaria verna | Synonym | Ranunculus ficaria | 2 | |
| Ficaria verna subsp. fertilis | Synonym | Ranunculus ficaria subsp. fertilis | 1 | |
| Ficus adhatodifolia | Accepted | Ficus adhatodifolia | 2 | |
| Ficus carica | Accepted | Ficus carica | 1 | |
| Ficus eximia | Accepted | Ficus eximia | 3 | |
| Ficus eximia | Accepted | Ficus eximia | 2 | |
| Ficus gomelleira | Accepted | Ficus gomelleira | 1 | |
| Ficus guaranitica | Synonym | Ficus citrifolia | 1 | |
| Ficus hirsuta | Accepted | Ficus hirsuta | 1 | |
| Ficus luschnathiana | Accepted | Ficus luschnathiana | 1 | |
| Ficus pertusa | Accepted | Ficus pertusa | 1 | |
| Ficus pulchella | Accepted | Ficus pulchella | 2 | |
| Filago arvensis | Accepted | Filago arvensis | 2 | |
| Filago gallica | Accepted | Filago gallica | 1 | |
| Filago lutescens | Accepted | Filago lutescens | 1 | |
| Filago minima | Synonym | Logfia minima | 1 | |
| Filago pyramidata | Accepted | Filago pyramidata | 1 | |
| Filago vulgaris | Synonym | Filago germanica | 1 | |
| Filipendula camtschatica | Accepted | Filipendula camtschatica | 1 | |
| Filipendula ulmaria | Accepted | Filipendula ulmaria | 1 | |
| Filipendula ulmaria subsp. denudata | Synonym | Filipendula ulmaria | 1 | |
| Filipendula ulmaria subsp. ulmaria | Synonym | Filipendula ulmaria | 1 | |
| Filipendula vulgaris | Accepted | Filipendula vulgaris | 2 | |
| Flagellaria neocaledonica | Accepted | Flagellaria neocaledonica | 1 | |
| Foeniculum vulgare | Accepted | Foeniculum vulgare | 1 | |
| Foeniculum vulgare subsp. piperitum | Synonym | Foeniculum vulgare | 1 | |
| Forsythia giraldiana | Accepted | Forsythia giraldiana | 1 | |
| Fouquieria diguetii | Accepted | Fouquieria diguetii | 1 | |
| Fourraea alpina | Synonym | Turritis brassica | 1 | |
| Fragaria moschata | Accepted | Fragaria moschata | 1 | |
| Fragaria vesca | Accepted | Fragaria vesca | 1 | |
| Fragaria viridis | Accepted | Fragaria viridis | 2 | |
| Frangula alnus | Accepted | Frangula alnus | 1 | |
| Frangula rupestris | Accepted | Frangula rupestris | 1 | |
| Frankenia pulverulenta | Accepted | Frankenia pulverulenta | 1 | |
| Fraxinus angustifolia subsp. oxycarpa | Accepted | Fraxinus angustifolia subsp. oxycarpa | 1 | |
| Fraxinus excelsior | Accepted | Fraxinus excelsior | 2 | |
| Fraxinus ornus | Accepted | Fraxinus ornus | 1 | |
| Fraxinus platypoda | Accepted | Fraxinus platypoda | 1 | |
| Fraxinus xanthoxyloides | Accepted | Fraxinus xanthoxyloides | 1 | |
| Fritillaria camschatcensis | Accepted | Fritillaria camschatcensis | 1 | |
| Fritillaria involucrata | Accepted | Fritillaria involucrata | 1 | |
| Fritillaria meleagris | Accepted | Fritillaria meleagris | 1 | |
| Fritillaria orientalis | Accepted | Fritillaria orientalis | 1 | |
| Fritillaria tubiformis | Accepted | Fritillaria tubiformis | 1 | |
| Fritillaria tubiformis subsp. moggridgei | Accepted | Fritillaria tubiformis subsp. moggridgei | 1 | |
| Fumana ericoides | Accepted | Fumana ericoides | 1 | |
| Fumana ericoides subsp. montana | Unchecked | 1 | ||
| Fumana laevipes | Accepted | Fumana laevipes | 1 | |
| Fumana procumbens | Accepted | Fumana procumbens | 1 | |
| Fumana thymifolia | Accepted | Fumana thymifolia | 1 | |
| Fumaria capreolata | Accepted | Fumaria capreolata | 1 | |
| Fumaria muralis | Accepted | Fumaria muralis | 1 | |
| Fumaria officinalis | Accepted | Fumaria officinalis | 1 | |
| Fumaria officinalis subsp. officinalis | Synonym | Fumaria officinalis | 1 | |
| Fumaria officinalis subsp. wirtgenii | Accepted | Fumaria officinalis subsp. wirtgenii | 1 | |
| Fumaria parviflora | Accepted | Fumaria parviflora | 1 | |
| Fumaria schleicheri | Accepted | Fumaria schleicheri | 1 | |
| Fumaria vaillantii | Accepted | Fumaria vaillantii | 1 | |
| Gagea fragifera | Accepted | Gagea fragifera | 1 | |
| Gagea granatelli | Accepted | Gagea granatelli | 1 | |
| Gagea lutea | Accepted | Gagea lutea | 2 | |
| Gagea lutea subsp. burnatii | Synonym | Gagea reverchonii | 1 | |
| Gagea minima | Accepted | Gagea minima | 1 | |
| Gagea pratensis | Accepted | Gagea pratensis | 1 | |
| Gagea saxatilis | Synonym | Gagea fragifera | 1 | |
| Gagea villosa | Accepted | Gagea villosa | 1 | |
| Galactites tomentosa | Unchecked | 1 | ||
| Galanthus nivalis | Accepted | Galanthus nivalis | 2 | |
| Galega officinalis | Accepted | Galega officinalis | 1 | |
| Galega orientalis | Accepted | Galega orientalis | 1 | |
| Galeopsis angustifolia | Accepted | Galeopsis angustifolia | 1 | |
| Galeopsis bifida | Accepted | Galeopsis bifida | 2 | |
| Galeopsis ladanum | Accepted | Galeopsis ladanum | 1 | |
| Galeopsis pubescens | Accepted | Galeopsis pubescens | 1 | |
| Galeopsis reuteri | Accepted | Galeopsis reuteri | 1 | |
| Galeopsis segetum | Accepted | Galeopsis segetum | 1 | |
| Galeopsis speciosa | Accepted | Galeopsis speciosa | 2 | |
| Galeopsis tetrahit | Accepted | Galeopsis tetrahit | 2 | |
| Galinsoga ciliata | Synonym | Galinsoga quadriradiata | 1 | |
| Galinsoga parviflora | Accepted | Galinsoga parviflora | 2 | |
| Galium album | Accepted | Galium album | 1 | |
| Galium anisophyllon | Accepted | Galium anisophyllon | 1 | |
| Galium aparine | Accepted | Galium aparine | 2 | |
| Galium aparine subsp. spurium | Synonym | Galium spurium | 1 | |
| Galium aparine subsp. tenerum | Synonym | Galium spurium | 1 | |
| Galium aristatum | Accepted | Galium aristatum | 1 | |
| Galium austriacum | Accepted | Galium austriacum | 1 | |
| Galium baillonii | Accepted | Galium baillonii | 1 | |
| Galium baldense | Accepted | Galium baldense | 1 | |
| Galium boreale | Accepted | Galium boreale | 2 | |
| Galium × centroniae | Accepted | Galium × centroniae | 1 | |
| Galium cinereum | Accepted | Galium cinereum | 1 | |
| Galium corrudifolium | Synonym | Galium lucidum subsp. corrudifolium | 1 | |
| Galium elongatum | Accepted | Galium elongatum | 1 | |
| Galium glaucum | Accepted | Galium glaucum | 1 | |
| Galium intermedium | Accepted | Galium intermedium | 1 | |
| Galium kitaibelianum | Accepted | Galium kitaibelianum | 1 | |
| Galium laevigatum | Accepted | Galium laevigatum | 1 | |
| Galium lucidum | Accepted | Galium lucidum | 1 | |
| Galium margaritaceum | Accepted | Galium margaritaceum | 1 | |
| Galium megalospermum | Accepted | Galium megalospermum | 1 | |
| Galium meliodorum | Accepted | Galium meliodorum | 1 | |
| Galium mollugo | Accepted | Galium mollugo | 1 | |
| Galium mollugo subsp. erectum | Synonym | Galium album subsp. album | 1 | |
| Galium montis-arerae | Accepted | Galium montis-arerae | 1 | |
| Galium murale | Accepted | Galium murale | 1 | |
| Galium noricum | Accepted | Galium noricum | 1 | |
| Galium obliquum | Accepted | Galium obliquum | 1 | |
| Galium odoratum | Accepted | Galium odoratum | 2 | |
| Galium palustre | Accepted | Galium palustre | 2 | |
| Galium parisiense | Accepted | Galium parisiense | 1 | |
| Galium pomeranicum | Accepted | Galium pomeranicum | 1 | |
| Galium pseudohelveticum | Accepted | Galium pseudohelveticum | 1 | |
| Galium pumilum | Accepted | Galium pumilum | 1 | |
| Galium pusillum | Accepted | Galium pusillum | 1 | |
| Galium rotundifolium | Accepted | Galium rotundifolium | 1 | |
| Galium rubioides | Accepted | Galium rubioides | 1 | |
| Galium rubrum | Accepted | Galium rubrum | 1 | |
| Galium saxatile | Accepted | Galium saxatile | 2 | |
| Galium saxosum | Accepted | Galium saxosum | 1 | |
| Galium spurium | Accepted | Galium spurium | 2 | |
| Galium sylvaticum | Accepted | Galium sylvaticum | 1 | |
| Galium tendae | Accepted | Galium tendae | 1 | |
| Galium timeroyi | Accepted | Galium timeroyi | 1 | |
| Galium tricornutum | Accepted | Galium tricornutum | 1 | |
| Galium trifidum | Accepted | Galium trifidum | 2 | |
| Galium triflorum | Accepted | Galium triflorum | 1 | |
| Galium truniacum | Accepted | Galium truniacum | 1 | |
| Galium uliginosum | Accepted | Galium uliginosum | 2 | |
| Galium verrucosum | Accepted | Galium verrucosum | 1 | |
| Galium verticillatum | Accepted | Galium verticillatum | 1 | |
| Galium verum | Accepted | Galium verum | 2 | |
| Galium verum subsp. wirtgenii | Accepted | Galium verum subsp. wirtgenii | 1 | |
| Garrya elliptica | Accepted | Garrya elliptica | 1 | |
| Gastridium ventricosum | Accepted | Gastridium ventricosum | 1 | |
| Gaudinia fragilis | Accepted | Gaudinia fragilis | 1 | |
| Geissospermum laeve | Accepted | Geissospermum laeve | 1 | |
| Genista anglica | Accepted | Genista anglica | 1 | |
| Genista cinerea | Accepted | Genista cinerea | 1 | |
| Genista germanica | Accepted | Genista germanica | 1 | |
| Genista hispanica | Accepted | Genista hispanica | 1 | |
| Genista holopetala | Accepted | Genista holopetala | 1 | |
| Genista januensis | Accepted | Genista januensis | 2 | |
| Genista pilosa | Accepted | Genista pilosa | 1 | |
| Genista pulchella | Accepted | Genista pulchella | 1 | |
| Genista radiata | Accepted | Genista radiata | 1 | |
| Genista sagittalis subsp. delphinensis | Accepted | Genista sagittalis subsp. delphinensis | 1 | |
| Genista sagittalis subsp. sagittalis | Unchecked | 1 | ||
| Genista scorpius | Accepted | Genista scorpius | 1 | |
| Genista sericea | Accepted | Genista sericea | 1 | |
| Genista spathulata | Synonym | Genista januensis | 1 | |
| Genista tinctoria | Accepted | Genista tinctoria | 1 | |
| Genista tinctoria | Accepted | Genista tinctoria | 1 | |
| Genista villarsii | Synonym | Genista pulchella subsp. pulchella | 1 | |
| Gentiana acaulis | Accepted | Gentiana acaulis | 1 | |
| Gentiana algida | Accepted | Gentiana algida | 1 | |
| Gentiana alpina | Accepted | Gentiana alpina | 1 | |
| Gentiana amarella | Synonym | Gentianella biebersteinii | 1 | |
| Gentiana angustifolia | Accepted | Gentiana angustifolia | 1 | |
| Gentiana anisodonta | Synonym | Gentianella anisodonta | 1 | |
| Gentiana asclepiadea | Accepted | Gentiana asclepiadea | 1 | |
| Gentiana aspera | Synonym | Gentianella aspera | 1 | |
| Gentiana austriaca | Synonym | Gentianella austriaca | 1 | |
| Gentiana bavarica | Accepted | Gentiana bavarica | 1 | |
| Gentiana brachyphylla | Accepted | Gentiana brachyphylla | 1 | |
| Gentiana burseri | Accepted | Gentiana burseri | 1 | |
| Gentiana burseri subsp. villarsii | Accepted | Gentiana burseri subsp. villarsii | 1 | |
| Gentiana ciliata | Synonym | Gentianopsis macrantha | 1 | |
| Gentiana clusii | Accepted | Gentiana clusii | 1 | |
| Gentiana cruciata | Accepted | Gentiana cruciata | 1 | |
| Gentiana cruciata | Accepted | Gentiana cruciata | 1 | |
| Gentiana dinarica | Unchecked | 2 | ||
| Gentiana engadinensis | Synonym | Gentianella engadinensis | 1 | |
| Gentiana frigida | Accepted | Gentiana frigida | 1 | |
| Gentiana froelichii | Accepted | Gentiana froelichii | 2 | |
| Gentiana germanica | Synonym | Gentianella germanica | 1 | |
| Gentiana insubrica | Synonym | Gentianella insubrica | 1 | |
| Gentiana ligustica | Accepted | Gentiana ligustica | 1 | |
| Gentiana lutea | Accepted | Gentiana lutea | 1 | |
| Gentiana lutea subsp. symphyandra | Accepted | Gentiana lutea subsp. symphyandra | 1 | |
| Gentiana lutea subsp. vardjanii | Accepted | Gentiana lutea subsp. vardjanii | 1 | |
| Gentiana nana | Synonym | Comastoma nanum | 1 | |
| Gentiana nivalis | Accepted | Gentiana nivalis | 3 | |
| Gentiana occidentalis | Accepted | Gentiana occidentalis | 1 | |
| Gentiana orbicularis | Synonym | Gentiana brachyphylla subsp. favratii | 1 | |
| Gentiana pannonica | Accepted | Gentiana pannonica | 1 | |
| Gentiana pneumonanthe | Accepted | Gentiana pneumonanthe | 2 | |
| Gentiana prostrata | Accepted | Gentiana prostrata | 2 | |
| Gentiana pumila | Accepted | Gentiana pumila | 2 | |
| Gentiana punctata | Accepted | Gentiana punctata | 1 | |
| Gentiana purpurea | Accepted | Gentiana purpurea | 1 | |
| Gentiana ramosa | Synonym | Gentiana taliensis | 1 | |
| Gentiana rostanii | Accepted | Gentiana rostanii | 1 | |
| Gentiana schleicheri | Synonym | Gentiana terglouensis subsp. schleicheri | 1 | |
| Gentiana sierrae | Accepted | Gentiana sierrae | 1 | |
| Gentiana tenella | Synonym | Comastoma tenellum | 1 | |
| Gentiana tergestina | Synonym | Gentiana verna subsp. tergestina | 1 | |
| Gentiana terglouensis | Accepted | Gentiana terglouensis | 1 | |
| Gentiana utriculosa | Accepted | Gentiana utriculosa | 3 | |
| Gentiana verna | Accepted | Gentiana verna | 1 | |
| Gentiana verna subsp. delphinensis | Synonym | Gentiana pumila subsp. delphinensis | 1 | |
| Gentianella amarella | Accepted | Gentianella amarella | 1 | |
| Gentianella aurea | Accepted | Gentianella aurea | 1 | |
| Gentianella campestris | Accepted | Gentianella campestris | 3 | |
| Gentianella fatrae | Synonym | Gentianella austriaca | 1 | |
| Gentianella propinqua | Accepted | Gentianella propinqua | 1 | |
| Gentianella uliginosa | Accepted | Gentianella uliginosa | 1 | |
| Gentianopsis detonsa | Accepted | Gentianopsis detonsa | 1 | |
| Geranium argenteum | Accepted | Geranium argenteum | 1 | |
| Geranium bohemicum | Accepted | Geranium bohemicum | 1 | |
| Geranium columbinum | Accepted | Geranium columbinum | 2 | |
| Geranium dissectum | Accepted | Geranium dissectum | 2 | |
| Geranium divaricatum | Accepted | Geranium divaricatum | 1 | |
| Geranium lucidum | Accepted | Geranium lucidum | 2 | |
| Geranium macrorrhizum | Accepted | Geranium macrorrhizum | 1 | |
| Geranium molle | Accepted | Geranium molle | 2 | |
| Geranium nodosum | Accepted | Geranium nodosum | 1 | |
| Geranium palustre | Accepted | Geranium palustre | 1 | |
| Geranium phaeum | Accepted | Geranium phaeum | 1 | |
| Geranium pratense | Accepted | Geranium pratense | 1 | |
| Geranium purpureum | Accepted | Geranium purpureum | 1 | |
| Geranium pusillum | Accepted | Geranium pusillum | 1 | |
| Geranium pyrenaicum | Accepted | Geranium pyrenaicum | 1 | |
| Geranium rivulare | Accepted | Geranium rivulare | 1 | |
| Geranium robertianum | Accepted | Geranium robertianum | 1 | |
| Geranium robertianum subsp. robertianum | Unchecked | 1 | ||
| Geranium rotundifolium | Accepted | Geranium rotundifolium | 1 | |
| Geranium sanguineum | Accepted | Geranium sanguineum | 1 | |
| Geranium sibiricum | Accepted | Geranium sibiricum | 1 | |
| Geranium sylvaticum | Accepted | Geranium sylvaticum | 2 | |
| Geum calthifolium | Accepted | Geum calthifolium | 1 | |
| Geum glaciale | Accepted | Geum glaciale | 1 | |
| Geum heterocarpum | Accepted | Geum heterocarpum | 1 | |
| Geum macrophyllum | Accepted | Geum macrophyllum | 1 | |
| Geum montanum | Accepted | Geum montanum | 1 | |
| Geum quellyon | Accepted | Geum quellyon | 1 | |
| Geum reptans | Accepted | Geum reptans | 1 | |
| Geum rivale | Accepted | Geum rivale | 2 | |
| Geum rossii | Accepted | Geum rossii | 1 | |
| Geum sylvaticum | Accepted | Geum sylvaticum | 1 | |
| Geum urbanum | Accepted | Geum urbanum | 2 | |
| Ginkgo biloba | Accepted | Ginkgo biloba | 1 | |
| Gisekia pharnaceoides | Accepted | Gisekia pharnaceoides | 1 | |
| Gladiolus communis | Accepted | Gladiolus communis | 1 | |
| Gladiolus illyricus | Accepted | Gladiolus illyricus | 2 | |
| Gladiolus imbricatus | Accepted | Gladiolus imbricatus | 1 | |
| Gladiolus italicus | Accepted | Gladiolus italicus | 1 | |
| Gladiolus palustris | Accepted | Gladiolus palustris | 1 | |
| Glaucium corniculatum | Accepted | Glaucium corniculatum | 1 | |
| Glaucium flavum | Accepted | Glaucium flavum | 1 | |
| Glaux maritima | Synonym | Lysimachia maritima | 1 | |
| Glebionis coronaria | Accepted | Glebionis coronaria | 2 | |
| Glebionis segetum | Accepted | Glebionis segetum | 2 | |
| Glechoma hederacea | Accepted | Glechoma hederacea | 1 | |
| Glechoma hederacea subsp. hederacea | Unchecked | 1 | ||
| Glechoma hederacea subsp. hirsuta | Synonym | Glechoma hirsuta | 1 | |
| Globularia alypum | Accepted | Globularia alypum | 1 | |
| Globularia bisnagarica | Accepted | Globularia bisnagarica | 1 | |
| Globularia cordifolia | Accepted | Globularia cordifolia | 1 | |
| Globularia nudicaulis | Accepted | Globularia nudicaulis | 1 | |
| Globularia repens | Accepted | Globularia repens | 1 | |
| Globularia vulgaris | Accepted | Globularia vulgaris | 1 | |
| Glossopetalon clokeyi | Accepted | Glossopetalon clokeyi | 1 | |
| Glyceria fluitans | Accepted | Glyceria fluitans | 2 | |
| Glyceria maxima | Accepted | Glyceria maxima | 1 | |
| Glyceria notata | Accepted | Glyceria notata | 1 | |
| Glyceria striata | Accepted | Glyceria striata | 1 | |
| Glycydendron amazonicum | Accepted | Glycydendron amazonicum | 1 | |
| Glycyrrhiza glabra | Accepted | Glycyrrhiza glabra | 1 | |
| Gnaphalium hoppeanum | Synonym | Omalotheca hoppeana | 1 | |
| Gnaphalium luteoalbum | Synonym | Helichrysum luteoalbum | 1 | |
| Gnaphalium norvegicum | Unchecked | 1 | ||
| Gnaphalium supinum | Accepted | Gnaphalium supinum | 1 | |
| Gnaphalium sylvaticum | Unchecked | 1 | ||
| Gnaphalium uliginosum | Accepted | Gnaphalium uliginosum | 2 | |
| Goodyera repens | Accepted | Goodyera repens | 2 | |
| Gordonia fruticosa | Accepted | Gordonia fruticosa | 1 | |
| Goupia glabra | Accepted | Goupia glabra | 1 | |
| Grafia golaka | Accepted | Grafia golaka | 1 | |
| Gratiola officinalis | Accepted | Gratiola officinalis | 1 | |
| Groenlandia densa | Accepted | Groenlandia densa | 1 | |
| Grubbia tomentosa | Accepted | Grubbia tomentosa | 1 | |
| Guamatela tuerckheimii | Accepted | Guamatela tuerckheimii | 1 | |
| Guarea costata | Accepted | Guarea costata | 1 | |
| Guarea guidonia | Accepted | Guarea guidonia | 1 | |
| Guarea kunthiana | Accepted | Guarea kunthiana | 1 | |
| Guarea macrophylla | Accepted | Guarea macrophylla | 2 | |
| Guatteria guianensis | Accepted | Guatteria guianensis | 1 | |
| Guizotia abyssinica | Accepted | Guizotia abyssinica | 1 | |
| Gunnera magellanica | Accepted | Gunnera magellanica | 1 | |
| Gunnera manicata | Accepted | Gunnera manicata | 1 | |
| Gustavia hexapetala | Accepted | Gustavia hexapetala | 2 | |
| Gymnadenia conopsea | Accepted | Gymnadenia conopsea | 2 | |
| Gymnadenia odoratissima | Accepted | Gymnadenia odoratissima | 1 | |
| Gymnocarpium continentale | Synonym | Gymnocarpium jessoense subsp. parvulum | 1 | |
| Gymnocarpium dryopteris | Accepted | Gymnocarpium dryopteris | 2 | |
| Gymnocarpium robertianum | Accepted | Gymnocarpium robertianum | 2 | |
| Gypsophila muralis | Accepted | Gypsophila muralis | 1 | |
| Gypsophila paniculata | Accepted | Gypsophila paniculata | 1 | |
| Gypsophila papillosa | Accepted | Gypsophila papillosa | 1 | |
| Gypsophila petraea | Accepted | Gypsophila petraea | 1 | |
| Gypsophila repens | Accepted | Gypsophila repens | 1 | |
| Gypsophila scorzonerifolia | Accepted | Gypsophila scorzonerifolia | 1 | |
| Hacquetia epipactis | Synonym | Sanicula epipactis | 1 | |
| Hainardia cylindrica | Accepted | Hainardia cylindrica | 1 | |
| Halimium umbellatum | Synonym | Cistus umbellatus | 1 | |
| Hammarbya paludosa | Accepted | Hammarbya paludosa | 2 | |
| Harrimanella hypnoides | Accepted | Harrimanella hypnoides | 1 | |
| Hebepetalum | Accepted | Hebepetalum | 1 | |
| Hedera helix | Accepted | Hedera helix | 2 | |
| Hedyosmum bonplandianum | Accepted | Hedyosmum bonplandianum | 1 | |
| Hedyosmum brasiliense | Accepted | Hedyosmum brasiliense | 1 | |
| Hedypnois cretica | Unchecked | 1 | ||
| Hedysarum alpinum | Accepted | Hedysarum alpinum | 1 | |
| Hedysarum boreale var. mackenziei | Unchecked | 1 | ||
| Hedysarum boutignyanum | Synonym | Hedysarum hedysaroides subsp. boutignyanum | 1 | |
| Hedysarum boveanum | Accepted | Hedysarum boveanum | 1 | |
| Hedysarum brigantiacum | Synonym | Hedysarum hedysaroides subsp. hedysaroides | 1 | |
| Hedysarum coronarium | Synonym | Sulla coronaria | 1 | |
| Hedysarum hedysaroides | Accepted | Hedysarum hedysaroides | 1 | |
| Hedysarum hedysaroides subsp. arcticum | Accepted | Hedysarum hedysaroides subsp. arcticum | 1 | |
| Heisteria densifrons | Accepted | Heisteria densifrons | 1 | |
| Helianthemum alpestre | Synonym | Helianthemum oelandicum subsp. alpestris | 2 | |
| Helianthemum apenninum | Accepted | Helianthemum apenninum | 1 | |
| Helianthemum hirtum | Accepted | Helianthemum hirtum | 1 | |
| Helianthemum italicum | Synonym | Helianthemum oelandicum subsp. italicum | 1 | |
| Helianthemum lunulatum | Accepted | Helianthemum lunulatum | 1 | |
| Helianthemum nummularium | Accepted | Helianthemum nummularium | 1 | |
| Helianthemum nummularium subsp. berteroanum | Accepted | Helianthemum nummularium subsp. berteroanum | 1 | |
| Helianthemum nummularium subsp. glabrum | Synonym | Helianthemum nummularium subsp. glabrum | 1 | |
| Helianthemum nummularium subsp. grandiflorum | Accepted | Helianthemum nummularium subsp. grandiflorum | 1 | |
| Helianthemum nummularium subsp. nummularium | Unchecked | 1 | ||
| Helianthemum nummularium subsp. obscurum | Unchecked | 1 | ||
| Helianthemum nummularium subsp. tomentosum | Accepted | Helianthemum nummularium subsp. tomentosum | 1 | |
| Helianthemum oelandicum subsp. incanum | Synonym | Helianthemum canum | 1 | |
| Helianthemum salicifolium | Accepted | Helianthemum salicifolium | 1 | |
| Helianthus annuus | Accepted | Helianthus annuus | 1 | |
| Helianthus pauciflorus | Accepted | Helianthus pauciflorus | 1 | |
| Helianthus tuberosus | Accepted | Helianthus tuberosus | 1 | |
| Helichrysum italicum | Accepted | Helichrysum italicum | 1 | |
| Helichrysum stoechas | Accepted | Helichrysum stoechas | 1 | |
| Heliconia biahij | Synonym | Heliconia wagneriana | 1 | |
| Helicostylis pedunculata | Accepted | Helicostylis pedunculata | 1 | |
| Helictochloa pratensis | Accepted | Helictochloa pratensis | 2 | |
| Helictotrichon bromoides | Accepted | Helictotrichon bromoides | 2 | |
| Helictotrichon decorum | Accepted | Helictotrichon decorum | 1 | |
| Helictotrichon parlatorei | Accepted | Helictotrichon parlatorei | 2 | |
| Helictotrichon petzense | Accepted | Helictotrichon petzense | 1 | |
| Helictotrichon pratense | Accepted | Helictotrichon pratense | 1 | |
| Helictotrichon pubescens | Accepted | Helictotrichon pubescens | 2 | |
| Helictotrichon sedenense | Accepted | Helictotrichon sedenense | 1 | |
| Helictotrichon sempervirens | Accepted | Helictotrichon sempervirens | 1 | |
| Helictotrichon setaceum | Accepted | Helictotrichon setaceum | 1 | |
| Helictotrichon versicolor | Accepted | Helictotrichon versicolor | 2 | |
| Heliotropium europaeum | Accepted | Heliotropium europaeum | 1 | |
| Helleborus dumetorum | Accepted | Helleborus dumetorum | 1 | |
| Helleborus foetidus | Accepted | Helleborus foetidus | 1 | |
| Helleborus niger | Accepted | Helleborus niger | 1 | |
| Helleborus odorus | Accepted | Helleborus odorus | 2 | |
| Helleborus viridis | Accepted | Helleborus viridis | 1 | |
| Helosis cayennensis | Accepted | Helosis cayennensis | 1 | |
| Hemerocallis fulva | Accepted | Hemerocallis fulva | 1 | |
| Hemerocallis lilioasphodelus | Accepted | Hemerocallis lilioasphodelus | 1 | |
| Henriettea glabra | Accepted | Henriettea glabra | 1 | |
| Hepatica nobilis | Accepted | Hepatica nobilis | 1 | |
| Hepatica transsilvanica | Accepted | Hepatica transsilvanica | 1 | |
| Heracleum austriacum | Accepted | Heracleum austriacum | 1 | |
| Heracleum austriacum subsp. siifolium | Accepted | Heracleum austriacum subsp. siifolium | 1 | |
| Heracleum carpaticum | Accepted | Heracleum carpaticum | 1 | |
| Heracleum mantegazzianum | Accepted | Heracleum mantegazzianum | 2 | |
| Heracleum persicum | Accepted | Heracleum persicum | 3 | |
| Heracleum persicum | Accepted | Heracleum persicum | 1 | |
| Heracleum pumilum | Accepted | Heracleum pumilum | 1 | |
| Heracleum sphondylium f. elegans | Unchecked | 1 | ||
| Heracleum sphondylium subsp. pyrenaicum | Accepted | Heracleum sphondylium subsp. pyrenaicum | 1 | |
| Heracleum sphondylium subsp. sibiricum | Accepted | Heracleum sphondylium subsp. sibiricum | 1 | |
| Heracleum sphondylium subsp. sphondylium | Unchecked | 1 | ||
| Heracleum sphondylium subsp. transsilvanicum | Accepted | Heracleum sphondylium subsp. transsilvanicum | 1 | |
| Herminium monorchis | Accepted | Herminium monorchis | 1 | |
| Hermodactylus tuberosus | Synonym | Iris tuberosa | 1 | |
| Hernandia guianensis | Accepted | Hernandia guianensis | 1 | |
| Herniaria alpina | Accepted | Herniaria alpina | 1 | |
| Herniaria glabra | Accepted | Herniaria glabra | 1 | |
| Herniaria hirsuta | Accepted | Herniaria hirsuta | 1 | |
| Herniaria hirsuta subsp. cinerea | Synonym | Herniaria hirsuta subsp. cinerea | 1 | |
| Herniaria incana | Accepted | Herniaria incana | 1 | |
| Hesperis inodora | Accepted | Hesperis inodora | 1 | |
| Hesperis laciniata | Accepted | Hesperis laciniata | 2 | |
| Hesperis matronalis | Accepted | Hesperis matronalis | 2 | |
| Hesperis matronalis subsp. cladotricha | Accepted | Hesperis matronalis subsp. cladotricha | 1 | |
| Hesperis matronalis subsp. matronalis | Synonym | Hesperis matronalis | 1 | |
| Hesperis matronalis subsp. nivea | Accepted | Hesperis matronalis subsp. nivea | 1 | |
| Hesperis obtusa | Synonym | Hesperis matronalis subsp. cladotricha | 1 | |
| Hesperis tristis | Accepted | Hesperis tristis | 1 | |
| Heteropogon contortus | Accepted | Heteropogon contortus | 1 | |
| Heteropterys oligantha | Accepted | Heteropterys oligantha | 1 | |
| Heuchera glabra | Accepted | Heuchera glabra | 1 | |
| Heuchera sanguinea | Accepted | Heuchera sanguinea | 2 | |
| Hevea guianensis | Accepted | Hevea guianensis | 1 | |
| Hibiscus palustris | Synonym | Hibiscus moscheutos | 1 | |
| Hieracium | Accepted | Hieracium | 2 | |
| Hieracium alpicola | Synonym | Pilosella alpicola | 1 | |
| Hieracium alpinum | Accepted | Hieracium alpinum | 2 | |
| Hieracium amplexicaule | Accepted | Hieracium amplexicaule | 1 | |
| Hieracium andryaloides | Synonym | Hieracium tomentosum subsp. andryaloides | 2 | |
| Hieracium angustifolium | Accepted | Hieracium angustifolium | 1 | |
| Hieracium argillaceum | Unchecked | 1 | ||
| Hieracium argillaceum | Unchecked | 1 | ||
| Hieracium armerioides | Accepted | Hieracium armerioides | 1 | |
| Hieracium atratum | Accepted | Hieracium atratum | 1 | |
| Hieracium aurantiacum | Synonym | Pilosella aurantiaca subsp. aurantiaca | 2 | |
| Hieracium bauhinii | Synonym | Pilosella bauhini | 1 | |
| Hieracium bifidum | Accepted | Hieracium bifidum | 2 | |
| Hieracium blyttianum | Synonym | Pilosella blyttiana | 1 | |
| Hieracium borsanum | Accepted | Hieracium borsanum | 1 | |
| Hieracium bupleuroides | Accepted | Hieracium bupleuroides | 2 | |
| Hieracium caesium | Accepted | Hieracium caesium | 1 | |
| Hieracium caesium | Accepted | Hieracium caesium | 1 | |
| Hieracium caespitosum | Synonym | Pilosella caespitosa subsp. caespitosa | 1 | |
| Hieracium carpathicum | Accepted | Hieracium carpathicum | 1 | |
| Hieracium cernaeglavae | Unchecked | 2 | ||
| Hieracium chloropsis | Accepted | Hieracium chloropsis | 1 | |
| Hieracium cydoniifolium | Accepted | Hieracium cydoniifolium | 1 | |
| Hieracium cymosum | Accepted | Hieracium cymosum | 3 | |
| Hieracium czamyjashense | Accepted | Hieracium czamyjashense | 1 | |
| Hieracium dovrense | Accepted | Hieracium dovrense | 1 | |
| Hieracium glaucinum | Accepted | Hieracium glaucinum | 1 | |
| Hieracium halleri | Unchecked | 1 | ||
| Hieracium halleri | Unchecked | 1 | ||
| Hieracium hoppeanum | Accepted | Hieracium hoppeanum | 1 | |
| Hieracium humile | Accepted | Hieracium humile | 1 | |
| Hieracium intybaceum | Unchecked | 1 | ||
| Hieracium kochianum | Accepted | Hieracium kochianum | 1 | |
| Hieracium krasanii | Accepted | Hieracium krasanii | 1 | |
| Hieracium lachenalii | Accepted | Hieracium lachenalii | 1 | |
| Hieracium lachenalii subsp. cruentifolium | Unchecked | 1 | ||
| Hieracium lactucella | Synonym | Pilosella lactucella subsp. lactucella | 1 | |
| Hieracium laevigatum | Accepted | Hieracium laevigatum | 3 | |
| Hieracium laevigatum subsp. tridentatum | Accepted | Hieracium laevigatum subsp. tridentatum | 1 | |
| Hieracium laggeri | Unchecked | 1 | ||
| Hieracium lawsonii | Accepted | Hieracium lawsonii | 1 | |
| Hieracium liottardii | Synonym | Hieracium tomentosum subsp. liottardii | 1 | |
| Hieracium lychnioides | Accepted | Hieracium lychnioides | 1 | |
| Hieracium lycopifolium | Accepted | Hieracium lycopifolium | 1 | |
| Hieracium macranthelum | Synonym | Pilosella macranthella | 1 | |
| Hieracium macranthelum | Synonym | Pilosella macranthella | 1 | |
| Hieracium murorum | Accepted | Hieracium murorum | 3 | |
| Hieracium niveum | Synonym | Pilosella tardans | 1 | |
| Hieracium oistophyllum | Accepted | Hieracium oistophyllum | 1 | |
| Hieracium onosmoides | Accepted | Hieracium onosmoides | 1 | |
| Hieracium onosmoides subsp. oreades | Accepted | Hieracium onosmoides subsp. oreades | 1 | |
| Hieracium oxydon | Accepted | Hieracium oxydon | 1 | |
| Hieracium pallidiflorum | Unchecked | 1 | ||
| Hieracium paxianum | Accepted | Hieracium paxianum | 1 | |
| Hieracium peleterianum | Synonym | Pilosella peleteriana subsp. peleteriana | 3 | |
| Hieracium picroides | Accepted | Hieracium picroides | 1 | |
| Hieracium pictum | Accepted | Hieracium pictum | 1 | |
| Hieracium piliferum | Accepted | Hieracium piliferum | 2 | |
| Hieracium pilosella | Synonym | Pilosella officinarum | 3 | |
| Hieracium piloselloides | Synonym | Pilosella piloselloides subsp. piloselloides | 1 | |
| Hieracium pilosum | Accepted | Hieracium pilosum | 1 | |
| Hieracium pojoritense | Accepted | Hieracium pojoritense | 1 | |
| Hieracium porrifolium | Accepted | Hieracium porrifolium | 2 | |
| Hieracium praealtum | Synonym | Pilosella piloselloides subsp. praealta | 1 | |
| Hieracium praecurrens | Accepted | Hieracium praecurrens | 1 | |
| Hieracium prenanthoides | Accepted | Hieracium prenanthoides | 3 | |
| Hieracium pseudocaesium | Accepted | Hieracium pseudocaesium | 1 | |
| Hieracium racemosum | Accepted | Hieracium racemosum | 1 | |
| Hieracium ratezaticum | Unchecked | 1 | ||
| Hieracium rohacsense | Unchecked | 1 | ||
| Hieracium rupestre | Accepted | Hieracium rupestre | 1 | |
| Hieracium sabaudum | Accepted | Hieracium sabaudum | 1 | |
| Hieracium saussureoides | Synonym | Pilosella saussureoides | 1 | |
| Hieracium schmidtii | Accepted | Hieracium schmidtii | 2 | |
| Hieracium scorzonerifolium | Accepted | Hieracium scorzonerifolium | 1 | |
| Hieracium sparsum | Accepted | Hieracium sparsum | 1 | |
| Hieracium sparsum subsp. silesiacum | Accepted | Hieracium sparsum subsp. silesiacum | 1 | |
| Hieracium staticifolium | Synonym | Tolpis staticifolia | 2 | |
| Hieracium stelligerum | Accepted | Hieracium stelligerum | 1 | |
| Hieracium telekianum | Synonym | Hieracium sparsum subsp. telekianum | 1 | |
| Hieracium tomentosum | Accepted | Hieracium tomentosum | 1 | |
| Hieracium transsilvanicum | Accepted | Hieracium transsilvanicum | 1 | |
| Hieracium umbellatum | Accepted | Hieracium umbellatum | 2 | |
| Hieracium umbrosum | Accepted | Hieracium umbrosum | 1 | |
| Hieracium umbrosum | Accepted | Hieracium umbrosum | 1 | |
| Hieracium umbrosum | Accepted | Hieracium umbrosum | 2 | |
| Hieracium valdepilosum | Accepted | Hieracium valdepilosum | 1 | |
| Hieracium verbascifolium | Unchecked | 1 | ||
| Hieracium villosum | Accepted | Hieracium villosum | 1 | |
| Hieracium viride | Accepted | Hieracium viride | 1 | |
| Hieracium virosum subsp. foliosum | Accepted | Hieracium virosum subsp. foliosum | 1 | |
| Hieracium viscosum | Accepted | Hieracium viscosum | 1 | |
| Hierochloe alpina | Accepted | Hierochloe alpina | 2 | |
| Hierochloe australis | Accepted | Hierochloe australis | 2 | |
| Hierochloe odorata | Accepted | Hierochloe odorata | 1 | |
| Hierochloe odorata subsp. arctica | Synonym | Anthoxanthum nitens | 1 | |
| Hierochloe odorata subsp. arctica | Synonym | Anthoxanthum nitens | 1 | |
| Hierochloe odorata subsp. odorata | Unchecked | 1 | ||
| Hieronyma alchorneoides | Accepted | Hieronyma alchorneoides | 1 | |
| Himantoglossum adriaticum | Accepted | Himantoglossum adriaticum | 1 | |
| Himantoglossum hircinum | Accepted | Himantoglossum hircinum | 1 | |
| Himantoglossum robertianum | Accepted | Himantoglossum robertianum | 1 | |
| Himatanthus | Accepted | Himatanthus | 1 | |
| Hippocrepis ciliata | Accepted | Hippocrepis ciliata | 2 | |
| Hippocrepis comosa | Accepted | Hippocrepis comosa | 1 | |
| Hippocrepis emerus | Accepted | Hippocrepis emerus | 2 | |
| Hippocrepis emerus subsp. emeroides | Accepted | Hippocrepis emerus subsp. emeroides | 1 | |
| Hippophae rhamnoides | Accepted | Hippophae rhamnoides | 2 | |
| Hippuris lanceolata | Unchecked | 1 | ||
| Hippuris tetraphylla | Accepted | Hippuris tetraphylla | 1 | |
| Hippuris vulgaris | Accepted | Hippuris vulgaris | 2 | |
| Hirschfeldia incana | Accepted | Hirschfeldia incana | 1 | |
| Hirtella araguariensis | Accepted | Hirtella araguariensis | 1 | |
| Hirtella arenosa | Accepted | Hirtella arenosa | 1 | |
| Hirtella bicornis | Accepted | Hirtella bicornis | 1 | |
| Hirtella bicornis | Accepted | Hirtella bicornis | 1 | |
| Hirtella davisii | Accepted | Hirtella davisii | 1 | |
| Hirtella dorvalii | Accepted | Hirtella dorvalii | 1 | |
| Hirtella duckei | Accepted | Hirtella duckei | 1 | |
| Hirtella elongata | Accepted | Hirtella elongata | 1 | |
| Hirtella glandistipula | Accepted | Hirtella glandistipula | 1 | |
| Hirtella glandulosa | Accepted | Hirtella glandulosa | 1 | |
| Hirtella hebeclada | Accepted | Hirtella hebeclada | 1 | |
| Hirtella magnifolia | Accepted | Hirtella magnifolia | 1 | |
| Hirtella margae | Accepted | Hirtella margae | 1 | |
| Hirtella paniculata | Accepted | Hirtella paniculata | 1 | |
| Hirtella pilosissima | Accepted | Hirtella pilosissima | 1 | |
| Hirtella punctillata | Accepted | Hirtella punctillata | 1 | |
| Hirtella rodriguesii | Accepted | Hirtella rodriguesii | 1 | |
| Hirtella schultesii | Accepted | Hirtella schultesii | 1 | |
| Hirtella silicea | Accepted | Hirtella silicea | 1 | |
| Hirtella tenuifolia | Accepted | Hirtella tenuifolia | 1 | |
| Hirtella triandra | Accepted | Hirtella triandra | 1 | |
| Hladnikia pastinacifolia | Accepted | Hladnikia pastinacifolia | 1 | |
| Holcus lanatus | Accepted | Holcus lanatus | 1 | |
| Holcus mollis | Accepted | Holcus mollis | 1 | |
| Holosteum umbellatum subsp. hirsutum | Accepted | Holosteum umbellatum subsp. hirsutum | 1 | |
| Holosteum umbellatum subsp. umbellatum | Synonym | Holosteum umbellatum | 1 | |
| Homogyne alpina | Accepted | Homogyne alpina | 1 | |
| Homogyne discolor | Accepted | Homogyne discolor | 1 | |
| Homogyne sylvestris | Unchecked | 1 | ||
| Honckenya peploides | Accepted | Honckenya peploides | 2 | |
| Honckenya peploides subsp. peploides | Synonym | Honckenya peploides | 1 | |
| Hordelymus europaeus | Accepted | Hordelymus europaeus | 2 | |
| Hordeum brachyantherum | Accepted | Hordeum brachyantherum | 1 | |
| Hordeum comosum | Accepted | Hordeum comosum | 1 | |
| Hordeum distichon | Accepted | Hordeum distichon | 1 | |
| Hordeum jubatum | Accepted | Hordeum jubatum | 1 | |
| Hordeum murinum | Accepted | Hordeum murinum | 1 | |
| Hordeum murinum subsp. leporinum | Accepted | Hordeum murinum subsp. leporinum | 2 | |
| Hordeum secalinum | Accepted | Hordeum secalinum | 1 | |
| Hordeum vulgare | Accepted | Hordeum vulgare | 1 | |
| Horminum pyrenaicum | Accepted | Horminum pyrenaicum | 1 | |
| Hornungia petraea | Accepted | Hornungia petraea | 1 | |
| Hortia excelsa | Accepted | Hortia excelsa | 1 | |
| Hottonia palustris | Accepted | Hottonia palustris | 2 | |
| Hugueninia tanacetifolia | Accepted | Hugueninia tanacetifolia | 1 | |
| Hulteniella integrifolia | Synonym | Chrysanthemum integrifolium | 1 | |
| Humulus lupulus | Accepted | Humulus lupulus | 2 | |
| Huperzia appressa | Accepted | Huperzia appressa | 1 | |
| Huperzia arctica | Synonym | Huperzia appressa | 1 | |
| Huperzia selago | Accepted | Huperzia selago | 3 | |
| Hyacinthoides hispanica | Accepted | Hyacinthoides hispanica | 1 | |
| Hyacinthoides italica | Accepted | Hyacinthoides italica | 1 | |
| Hyacinthus orientalis | Accepted | Hyacinthus orientalis | 1 | |
| Hydnora esculenta | Accepted | Hydnora esculenta | 1 | |
| Hydrocharis morsus-ranae | Accepted | Hydrocharis morsus-ranae | 2 | |
| Hydrocotyle vulgaris | Accepted | Hydrocotyle vulgaris | 2 | |
| Hydrolea spinosa | Accepted | Hydrolea spinosa | 1 | |
| Hylotelephium argutum | Synonym | Hylotelephium telephium subsp. fabaria | 1 | |
| Hymenaea courbaril | Accepted | Hymenaea courbaril | 1 | |
| Hymenolobus pauciflorus | Synonym | Hornungia procumbens | 1 | |
| Hyoscyamus albus | Accepted | Hyoscyamus albus | 1 | |
| Hyoscyamus niger | Accepted | Hyoscyamus niger | 2 | |
| Hyoseris radiata | Accepted | Hyoseris radiata | 1 | |
| Hyparrhenia hirta | Accepted | Hyparrhenia hirta | 1 | |
| Hypecoum pendulum | Accepted | Hypecoum pendulum | 1 | |
| Hypericum androsaemum | Accepted | Hypericum androsaemum | 1 | |
| Hypericum coris | Accepted | Hypericum coris | 1 | |
| Hypericum elodes | Accepted | Hypericum elodes | 1 | |
| Hypericum hirsutum | Accepted | Hypericum hirsutum | 2 | |
| Hypericum humifusum | Accepted | Hypericum humifusum | 1 | |
| Hypericum hyssopifolium | Accepted | Hypericum hyssopifolium | 1 | |
| Hypericum maculatum | Accepted | Hypericum maculatum | 1 | |
| Hypericum maculatum | Accepted | Hypericum maculatum | 1 | |
| Hypericum maculatum subsp. obtusiusculum | Accepted | Hypericum maculatum subsp. obtusiusculum | 1 | |
| Hypericum montanum | Accepted | Hypericum montanum | 2 | |
| Hypericum nummularium | Accepted | Hypericum nummularium | 1 | |
| Hypericum perforatum | Accepted | Hypericum perforatum | 1 | |
| Hypericum perforatum | Accepted | Hypericum perforatum | 1 | |
| Hypericum perforatum subsp. veronense | Synonym | Hypericum perforatum subsp. veronense | 1 | |
| Hypericum pulchrum | Accepted | Hypericum pulchrum | 2 | |
| Hypericum richeri | Accepted | Hypericum richeri | 1 | |
| Hypericum richeri subsp. grisebachii | Accepted | Hypericum richeri subsp. grisebachii | 1 | |
| Hypericum rochelii | Accepted | Hypericum rochelii | 1 | |
| Hypericum tetrapterum | Accepted | Hypericum tetrapterum | 1 | |
| Hypericum transsilvanicum | Synonym | Hypericum richeri subsp. grisebachii | 2 | |
| Hypericum umbellatum | Accepted | Hypericum umbellatum | 1 | |
| Hypochaeris glabra | Accepted | Hypochaeris glabra | 1 | |
| Hypochaeris maculata | Accepted | Hypochaeris maculata | 1 | |
| Hypochaeris radicata | Accepted | Hypochaeris radicata | 1 | |
| Hypochaeris uniflora | Accepted | Hypochaeris uniflora | 1 | |
| Hyssopus officinalis | Accepted | Hyssopus officinalis | 2 | |
| Hyssopus officinalis subsp. canescens | Accepted | Hyssopus officinalis subsp. canescens | 1 | |
| Hyssopus officinalis subsp. montanus | Accepted | Hyssopus officinalis subsp. montanus | 1 | |
| Hyssopus officinalis subsp. pilifer | Synonym | Hyssopus officinalis subsp. aristatus | 1 | |
| Iberis amara | Accepted | Iberis amara | 2 | |
| Iberis aurosica | Accepted | Iberis aurosica | 1 | |
| Iberis ciliata | Accepted | Iberis ciliata | 1 | |
| Iberis intermedia | Synonym | Iberis linifolia subsp. intermedia | 1 | |
| Iberis intermedia subsp. beugesiaca | Synonym | Iberis linifolia | 1 | |
| Iberis linifolia | Accepted | Iberis linifolia | 1 | |
| Iberis nana | Synonym | Iberis aurosica subsp. nana | 1 | |
| Iberis pinnata | Accepted | Iberis pinnata | 1 | |
| Iberis saxatilis | Accepted | Iberis saxatilis | 1 | |
| Iberis sempervirens | Accepted | Iberis sempervirens | 1 | |
| Iberis umbellata | Accepted | Iberis umbellata | 1 | |
| Ichnanthus pallens | Accepted | Ichnanthus pallens | 1 | |
| Ilex | Accepted | Ilex | 1 | |
| Ilex aquifolium | Accepted | Ilex aquifolium | 2 | |
| Ilex brasiliensis | Accepted | Ilex brasiliensis | 1 | |
| Ilex dumosa | Accepted | Ilex dumosa | 2 | |
| Ilex paraguariensis | Accepted | Ilex paraguariensis | 1 | |
| Ilex theezans | Accepted | Ilex theezans | 1 | |
| Impatiens balfourii | Accepted | Impatiens balfourii | 1 | |
| Impatiens balsamina | Accepted | Impatiens balsamina | 1 | |
| Impatiens glandulifera | Accepted | Impatiens glandulifera | 2 | |
| Impatiens noli-tangere | Accepted | Impatiens noli-tangere | 2 | |
| Impatiens parviflora | Accepted | Impatiens parviflora | 2 | |
| Inga rubiginosa | Accepted | Inga rubiginosa | 1 | |
| Inula bifrons | Synonym | Pentanema bifrons | 1 | |
| Inula britannica | Unchecked | 1 | ||
| Inula conyza | Synonym | Pentanema conyzae | 2 | |
| Inula ensifolia | Synonym | Pentanema ensifolium | 3 | |
| Inula germanica | Synonym | Pentanema spiraeifolium | 1 | |
| Inula graveolens | Synonym | Dittrichia graveolens | 1 | |
| Inula helenium | Accepted | Inula helenium | 1 | |
| Inula helvetica | Accepted | Inula helvetica | 1 | |
| Inula hirta | Synonym | Pentanema britannicum | 1 | |
| Inula montana | Unchecked | 1 | ||
| Inula oculus-christi | Unchecked | 1 | ||
| Inula salicina | Unchecked | 2 | ||
| Inula spiraeifolia | Unchecked | 1 | ||
| Inula viscosa | Synonym | Dittrichia viscosa subsp. viscosa | 1 | |
| Iris aphylla | Accepted | Iris aphylla | 1 | |
| Iris foetidissima | Accepted | Iris foetidissima | 1 | |
| Iris × germanica | Accepted | Iris × germanica | 1 | |
| Iris graminea | Accepted | Iris graminea | 1 | |
| Iris lutescens | Accepted | Iris lutescens | 1 | |
| Iris pallida subsp. cengialti | Accepted | Iris pallida subsp. cengialti | 1 | |
| Iris pseudacorus | Accepted | Iris pseudacorus | 2 | |
| Iris pumila | Accepted | Iris pumila | 1 | |
| Iris sambucina | Synonym | Iris × germanica | 1 | |
| Iris sibirica | Accepted | Iris sibirica | 1 | |
| Iris squalens | Synonym | Iris × germanica | 1 | |
| Iris variegata | Accepted | Iris variegata | 1 | |
| Irvingia gabonensis | Accepted | Irvingia gabonensis | 1 | |
| Irvingia grandifolia | Accepted | Irvingia grandifolia | 1 | |
| Iryanthera sagotiana | Accepted | Iryanthera sagotiana | 1 | |
| Isatis alpina | Synonym | Isatis apennina | 1 | |
| Isatis tinctoria | Accepted | Isatis tinctoria | 2 | |
| Ischnosiphon obliquus | Accepted | Ischnosiphon obliquus | 1 | |
| Isoetes echinospora | Accepted | Isoetes echinospora | 1 | |
| Isoetes lacustris | Accepted | Isoetes lacustris | 1 | |
| Isoetes setacea | Accepted | Isoetes setacea | 1 | |
| Isolepis setacea | Accepted | Isolepis setacea | 1 | |
| Isopyrum thalictroides | Accepted | Isopyrum thalictroides | 1 | |
| Jacaranda copaia | Accepted | Jacaranda copaia | 1 | |
| Jacaratia digitata | Accepted | Jacaratia digitata | 1 | |
| Jacaratia spinosa | Accepted | Jacaratia spinosa | 1 | |
| Jacobaea abrotanifolia subsp. carpathica | Accepted | Jacobaea abrotanifolia subsp. carpathica | 1 | |
| Jacobaea abrotanifolia subsp. tiroliensis | Accepted | Jacobaea abrotanifolia subsp. tiroliensis | 1 | |
| Jasione jankae | Synonym | Jasione heldreichii | 1 | |
| Jasione montana | Accepted | Jasione montana | 2 | |
| Jasminum fluminense | Accepted | Jasminum fluminense | 1 | |
| Jasminum fruticans | Synonym | Chrysojasminum fruticans | 1 | |
| Jasminum kitchingii | Accepted | Jasminum kitchingii | 1 | |
| Jasminum nudiflorum | Accepted | Jasminum nudiflorum | 1 | |
| Jasminum officinale | Accepted | Jasminum officinale | 1 | |
| Jasonia tuberosa | Accepted | Jasonia tuberosa | 1 | |
| Jessenia bataua | Synonym | Oenocarpus bataua | 1 | |
| Joinvillea plicata | Accepted | Joinvillea plicata | 1 | |
| Jovibarba allionii | Synonym | Sempervivum globiferum subsp. allionii | 2 | |
| Jovibarba globifera | Synonym | Sempervivum globiferum | 1 | |
| Jovibarba hirta | Synonym | Sempervivum globiferum subsp. hirtum | 1 | |
| Juglans regia | Accepted | Juglans regia | 1 | |
| Juncus acutiflorus | Accepted | Juncus acutiflorus | 2 | |
| Juncus alpinoarticulatus | Accepted | Juncus alpinoarticulatus | 4 | |
| Juncus alpinoarticulatus subsp. fuscoater | Synonym | Juncus alpinoarticulatus | 1 | |
| Juncus ambiguus | Synonym | Juncus ranarius | 1 | |
| Juncus arcticus | Accepted | Juncus arcticus | 2 | |
| Juncus articulatus | Accepted | Juncus articulatus | 2 | |
| Juncus balticus | Accepted | Juncus balticus | 3 | |
| Juncus brevicaudatus | Accepted | Juncus brevicaudatus | 1 | |
| Juncus bufonius | Accepted | Juncus bufonius | 3 | |
| Juncus bulbosus | Accepted | Juncus bulbosus | 2 | |
| Juncus capitatus | Accepted | Juncus capitatus | 1 | |
| Juncus castaneus | Accepted | Juncus castaneus | 1 | |
| Juncus castaneus | Accepted | Juncus castaneus | 1 | |
| Juncus compressus | Accepted | Juncus compressus | 1 | |
| Juncus conglomeratus | Accepted | Juncus conglomeratus | 1 | |
| Juncus effusus | Accepted | Juncus effusus | 2 | |
| Juncus filiformis | Accepted | Juncus filiformis | 2 | |
| Juncus gerardii | Accepted | Juncus gerardii | 1 | |
| Juncus gerardii subsp. atrofuscus | Accepted | Juncus gerardii subsp. atrofuscus | 1 | |
| Juncus inflexus | Accepted | Juncus inflexus | 1 | |
| Juncus jacquinii | Accepted | Juncus jacquinii | 1 | |
| Juncus monanthos | Synonym | Oreojuncus monanthos | 1 | |
| Juncus ranarius | Accepted | Juncus ranarius | 1 | |
| Juncus sphaerocarpus | Accepted | Juncus sphaerocarpus | 1 | |
| Juncus squarrosus | Accepted | Juncus squarrosus | 1 | |
| Juncus stygius | Accepted | Juncus stygius | 1 | |
| Juncus subnodulosus | Accepted | Juncus subnodulosus | 1 | |
| Juncus tenageia | Accepted | Juncus tenageia | 1 | |
| Juncus tenuis | Accepted | Juncus tenuis | 1 | |
| Juncus trifidus | Synonym | Oreojuncus trifidus | 2 | |
| Juncus triglumis | Accepted | Juncus triglumis | 3 | |
| Juniperus communis subsp. alpina | Synonym | Juniperus communis var. saxatilis | 1 | |
| Juniperus communis subsp. communis | Unchecked | 2 | ||
| Juniperus communis subsp. hemisphaerica | Synonym | Juniperus communis var. hemisphaerica | 1 | |
| Juniperus communis subsp. nana | Synonym | Juniperus communis var. saxatilis | 1 | |
| Juniperus communis var. saxatilis | Accepted | Juniperus communis var. saxatilis | 2 | |
| Juniperus oxycedrus | Accepted | Juniperus oxycedrus | 1 | |
| Juniperus phoenicea | Accepted | Juniperus phoenicea | 1 | |
| Juniperus sabina | Accepted | Juniperus sabina | 2 | |
| Juniperus thurifera | Accepted | Juniperus thurifera | 1 | |
| Jurinea glycacantha | Accepted | Jurinea glycacantha | 1 | |
| Jurinea humilis | Accepted | Jurinea humilis | 1 | |
| Jurinea mollis | Accepted | Jurinea mollis | 1 | |
| Kalmia polifolia | Accepted | Kalmia polifolia | 1 | |
| Kalmia procumbens | Accepted | Kalmia procumbens | 1 | |
| Kernera saxatilis | Accepted | Kernera saxatilis | 1 | |
| Kickxia elatine | Accepted | Kickxia elatine | 1 | |
| Kickxia spuria | Accepted | Kickxia spuria | 1 | |
| Knautia arvensis | Accepted | Knautia arvensis | 2 | |
| Knautia baldensis | Accepted | Knautia baldensis | 1 | |
| Knautia dipsacifolia | Accepted | Knautia dipsacifolia | 2 | |
| Knautia drymeia | Accepted | Knautia drymeia | 2 | |
| Knautia drymeia subsp. centrifrons | Accepted | Knautia drymeia subsp. centrifrons | 1 | |
| Knautia drymeia subsp. intermedia | Accepted | Knautia drymeia subsp. intermedia | 1 | |
| Knautia fleischmannii | Accepted | Knautia fleischmannii | 1 | |
| Knautia integrifolia | Accepted | Knautia integrifolia | 1 | |
| Knautia kitaibelii | Accepted | Knautia kitaibelii | 1 | |
| Knautia leucophaea | Synonym | Knautia arvensis | 1 | |
| Knautia longifolia | Accepted | Knautia longifolia | 1 | |
| Knautia mollis | Accepted | Knautia mollis | 1 | |
| Knautia persicina | Accepted | Knautia persicina | 1 | |
| Knautia purpurea | Synonym | Knautia collina | 1 | |
| Knautia ressmanni | Accepted | Knautia ressmanni | 1 | |
| Knautia transalpina | Accepted | Knautia transalpina | 1 | |
| Knautia velutina | Accepted | Knautia velutina | 1 | |
| Kobresia myosuroides | Accepted | Kobresia myosuroides | 1 | |
| Kobresia sibirica | Accepted | Kobresia sibirica | 1 | |
| Kobresia simpliciuscula | Accepted | Kobresia simpliciuscula | 2 | |
| Koeleria asiatica | Accepted | Koeleria asiatica | 1 | |
| Koeleria cenisia | Accepted | Koeleria cenisia | 1 | |
| Koeleria eriostachya | Accepted | Koeleria eriostachya | 1 | |
| Koeleria hirsuta | Accepted | Koeleria hirsuta | 1 | |
| Koeleria macrantha | Accepted | Koeleria macrantha | 1 | |
| Koeleria macrantha | Accepted | Koeleria macrantha | 1 | |
| Koeleria macrantha subsp. transsilvanica | Accepted | Koeleria macrantha subsp. transsilvanica | 1 | |
| Koeleria pyramidata | Accepted | Koeleria pyramidata | 2 | |
| Koeleria vallesiana | Accepted | Koeleria vallesiana | 1 | |
| Koenigia islandica | Accepted | Koenigia islandica | 1 | |
| Laburnum alpinum | Accepted | Laburnum alpinum | 2 | |
| Laburnum anagyroides subsp. alschingeri | Synonym | Laburnum anagyroidis | 1 | |
| Laburnum anagyroides subsp. anagyroides | Synonym | Laburnum anagyroidis | 1 | |
| Laburnum anagyroidis | Accepted | Laburnum anagyroidis | 1 | |
| Lacistema grandifolium | Accepted | Lacistema grandifolium | 1 | |
| Lacmellea aculeata | Accepted | Lacmellea aculeata | 1 | |
| Lactoris fernandeziana | Accepted | Lactoris fernandeziana | 1 | |
| Lactuca perennis | Accepted | Lactuca perennis | 1 | |
| Lactuca quercina subsp. chaixii | Synonym | Lactuca quercina | 1 | |
| Lactuca saligna | Accepted | Lactuca saligna | 1 | |
| Lactuca serriola | Accepted | Lactuca serriola | 1 | |
| Lactuca viminea subsp. chondrilliflora | Unchecked | 1 | ||
| Lactuca viminea subsp. viminea | Unchecked | 1 | ||
| Lactuca virosa | Accepted | Lactuca virosa | 1 | |
| Lacunaria jenmanii | Accepted | Lacunaria jenmanii | 1 | |
| Lagarosiphon major | Accepted | Lagarosiphon major | 1 | |
| Lagotis glauca | Accepted | Lagotis glauca | 2 | |
| Lamarckia aurea | Accepted | Lamarckia aurea | 1 | |
| Lamium album | Accepted | Lamium album | 2 | |
| Lamium amplexicaule | Accepted | Lamium amplexicaule | 2 | |
| Lamium galeobdolon | Accepted | Lamium galeobdolon | 1 | |
| Lamium galeobdolon subsp. flavidum | Accepted | Lamium galeobdolon subsp. flavidum | 1 | |
| Lamium galeobdolon subsp. montanum | Accepted | Lamium galeobdolon subsp. montanum | 1 | |
| Lamium garganicum | Accepted | Lamium garganicum | 1 | |
| Lamium hybridum | Synonym | Lamium purpureum var. hybridum | 1 | |
| Lamium maculatum | Accepted | Lamium maculatum | 1 | |
| Lamium orvala | Accepted | Lamium orvala | 1 | |
| Lamium purpureum | Accepted | Lamium purpureum | 3 | |
| Lamium purpureum var. hybridum | Accepted | Lamium purpureum var. hybridum | 1 | |
| Lanaria plumosa | Synonym | Lanaria lanata | 1 | |
| Lappula deflexa | Accepted | Lappula deflexa | 1 | |
| Lappula squarrosa | Accepted | Lappula squarrosa | 1 | |
| Lapsana communis | Accepted | Lapsana communis | 2 | |
| Lapsana communis subsp. intermedia | Accepted | Lapsana communis subsp. intermedia | 1 | |
| Larix decidua | Accepted | Larix decidua | 2 | |
| Laserpitium gallicum | Accepted | Laserpitium gallicum | 1 | |
| Laserpitium gaudinii | Synonym | Laserpitium krapffii subsp. gaudinii | 1 | |
| Laserpitium halleri | Accepted | Laserpitium halleri | 1 | |
| Laserpitium latifolium | Accepted | Laserpitium latifolium | 2 | |
| Laserpitium nitidum | Accepted | Laserpitium nitidum | 1 | |
| Laserpitium peucedanoides | Accepted | Laserpitium peucedanoides | 1 | |
| Laserpitium prutenicum | Synonym | Silphiodaucus prutenicus | 2 | |
| Laserpitium siler | Synonym | Siler montanum | 1 | |
| Laser trilobum | Accepted | Laser trilobum | 1 | |
| Lasiacis nigra | Accepted | Lasiacis nigra | 1 | |
| Lathraea squamaria | Accepted | Lathraea squamaria | 2 | |
| Lathyrus angulatus | Accepted | Lathyrus angulatus | 1 | |
| Lathyrus annuus | Accepted | Lathyrus annuus | 1 | |
| Lathyrus aphaca | Accepted | Lathyrus aphaca | 2 | |
| Lathyrus cicera | Accepted | Lathyrus cicera | 1 | |
| Lathyrus filiformis | Accepted | Lathyrus filiformis | 1 | |
| Lathyrus hallersteinii | Accepted | Lathyrus hallersteinii | 1 | |
| Lathyrus heterophyllus | Accepted | Lathyrus heterophyllus | 1 | |
| Lathyrus hirsutus | Accepted | Lathyrus hirsutus | 1 | |
| Lathyrus japonicus | Accepted | Lathyrus japonicus | 1 | |
| Lathyrus laevigatus subsp. occidentalis | Accepted | Lathyrus laevigatus subsp. occidentalis | 1 | |
| Lathyrus latifolius | Accepted | Lathyrus latifolius | 1 | |
| Lathyrus linifolius | Accepted | Lathyrus linifolius | 2 | |
| Lathyrus niger | Accepted | Lathyrus niger | 2 | |
| Lathyrus nissolia | Accepted | Lathyrus nissolia | 1 | |
| Lathyrus ochraceus subsp. occidentalis | Synonym | Lathyrus laevigatus subsp. occidentalis | 1 | |
| Lathyrus ochrus | Accepted | Lathyrus ochrus | 1 | |
| Lathyrus palustris | Accepted | Lathyrus palustris | 3 | |
| Lathyrus pannonicus subsp. asphodeloides | Accepted | Lathyrus pannonicus subsp. asphodeloides | 1 | |
| Lathyrus pratensis | Accepted | Lathyrus pratensis | 2 | |
| Lathyrus setifolius | Accepted | Lathyrus setifolius | 1 | |
| Lathyrus sphaericus | Accepted | Lathyrus sphaericus | 1 | |
| Lathyrus sylvestris | Accepted | Lathyrus sylvestris | 3 | |
| Lathyrus tuberosus | Accepted | Lathyrus tuberosus | 1 | |
| Lathyrus venetus | Accepted | Lathyrus venetus | 1 | |
| Lathyrus vernus | Accepted | Lathyrus vernus | 1 | |
| Lathyrus vernus subsp. gracilis | Synonym | Lathyrus vernus | 1 | |
| Lathyrus vernus subsp. vernus | Synonym | Lathyrus vernus | 1 | |
| Laurus nobilis | Accepted | Laurus nobilis | 1 | |
| Lavandula angustifolia | Accepted | Lavandula angustifolia | 1 | |
| Lavandula latifolia | Accepted | Lavandula latifolia | 1 | |
| Lavatera maritima | Synonym | Malva subovata | 1 | |
| Lavatera thuringiaca | Synonym | Malva thuringiaca | 1 | |
| Leandra melastomoides | Synonym | Miconia melastomoides | 1 | |
| Leandra variabilis | Synonym | Miconia dasytricha | 1 | |
| Lecythis corrugata | Accepted | Lecythis corrugata | 1 | |
| Lecythis persistens | Accepted | Lecythis persistens | 1 | |
| Lecythis poiteaui | Accepted | Lecythis poiteaui | 1 | |
| Lecythis zabucajo | Accepted | Lecythis zabucajo | 1 | |
| Leersia oryzoides | Accepted | Leersia oryzoides | 1 | |
| Legousia falcata | Accepted | Legousia falcata | 1 | |
| Legousia hybrida | Accepted | Legousia hybrida | 1 | |
| Legousia scabra | Synonym | Legousia falcata | 1 | |
| Legousia speculum-veneris | Accepted | Legousia speculum-veneris | 1 | |
| Lembotropis nigricans | Synonym | Cytisus nigricans | 1 | |
| Lemna gibba | Accepted | Lemna gibba | 1 | |
| Lemna minor | Accepted | Lemna minor | 2 | |
| Lemna minuta | Accepted | Lemna minuta | 2 | |
| Lemna trisulca | Accepted | Lemna trisulca | 2 | |
| Lens nigricans | Synonym | Vicia lentoides | 1 | |
| Leonia glycycarpa | Accepted | Leonia glycycarpa | 1 | |
| Leontodon autumnalis | Synonym | Scorzoneroides autumnalis | 1 | |
| Leontodon crispus | Accepted | Leontodon crispus | 1 | |
| Leontodon helveticus | Synonym | Scorzoneroides helvetica | 1 | |
| Leontodon hirtus | Accepted | Leontodon hirtus | 1 | |
| Leontodon hispidus | Accepted | Leontodon hispidus | 2 | |
| Leontodon hispidus subsp. danubialis | Synonym | Leontodon hispidus | 1 | |
| Leontodon incanus subsp. tenuiflorus | Synonym | Leontodon tenuiflorus | 1 | |
| Leontodon montanus subsp. montaniformis | Synonym | Scorzoneroides montana subsp. montaniformis | 1 | |
| Leontodon montanus subsp. montanus | Synonym | Scorzoneroides montana | 1 | |
| Leontodon saxatilis | Accepted | Leontodon saxatilis | 1 | |
| Leontopodium alpinum | Synonym | Leontopodium nivale subsp. alpinum | 1 | |
| Leonurus cardiaca | Accepted | Leonurus cardiaca | 2 | |
| Leonurus marrubiastrum | Synonym | Chaiturus marrubiastrum | 1 | |
| Lepidium campestre | Accepted | Lepidium campestre | 1 | |
| Lepidium densiflorum | Accepted | Lepidium densiflorum | 1 | |
| Lepidium graminifolium | Accepted | Lepidium graminifolium | 1 | |
| Lepidium hirtum | Accepted | Lepidium hirtum | 1 | |
| Lepidium latifolium | Accepted | Lepidium latifolium | 2 | |
| Lepidium neglectum | Synonym | Lepidium densiflorum | 1 | |
| Lepidium ruderale | Accepted | Lepidium ruderale | 1 | |
| Lepidium villarsii | Accepted | Lepidium villarsii | 1 | |
| Lepidium virginicum | Accepted | Lepidium virginicum | 1 | |
| Lepidostemon everestianus | Accepted | Lepidostemon everestianus | 1 | |
| Lepidostemon glaricola | Accepted | Lepidostemon glaricola | 3 | |
| Lepidostemon gouldii | Accepted | Lepidostemon gouldii | 1 | |
| Lepidostemon pedunculosus | Accepted | Lepidostemon pedunculosus | 1 | |
| Lepidostemon rosularis | Accepted | Lepidostemon rosularis | 1 | |
| Lepidostemon williamsii | Accepted | Lepidostemon williamsii | 3 | |
| Lepidotheca suaveolens | Synonym | Matricaria discoidea | 2 | |
| Leucanthemopsis alpina | Accepted | Leucanthemopsis alpina | 1 | |
| Leucanthemopsis alpina subsp. tatrae | Accepted | Leucanthemopsis alpina subsp. tatrae | 1 | |
| Leucanthemopsis alpina var. pseudotomentosa | Synonym | Leucanthemopsis alpina subsp. pseudotomentosa | 1 | |
| Leucanthemopsis minima | Synonym | Leucanthemopsis alpina subsp. minima | 1 | |
| Leucanthemum adustum | Accepted | Leucanthemum adustum | 1 | |
| Leucanthemum adustum subsp. margaritae | Accepted | Leucanthemum adustum subsp. margaritae | 1 | |
| Leucanthemum atratum subsp. atratum | Synonym | Leucanthemum atratum | 1 | |
| Leucanthemum atratum subsp. ceratophylloides | Synonym | Leucanthemum coronopifolium subsp. ceratophylloides | 1 | |
| Leucanthemum atratum subsp. coronopifolium | Synonym | Leucanthemum coronopifolium | 2 | |
| Leucanthemum atratum subsp. halleri | Synonym | Leucanthemum halleri | 1 | |
| Leucanthemum burnatii | Accepted | Leucanthemum burnatii | 1 | |
| Leucanthemum cuneifolium | Accepted | Leucanthemum cuneifolium | 1 | |
| Leucanthemum discoideum | Synonym | Leucanthemum pallens | 1 | |
| Leucanthemum heterophyllum | Accepted | Leucanthemum heterophyllum | 1 | |
| Leucanthemum maximum | Accepted | Leucanthemum maximum | 1 | |
| Leucanthemum pallens | Accepted | Leucanthemum pallens | 1 | |
| Leucanthemum pallens subsp. leucolepis | Synonym | Leucanthemum ircutianum subsp. leucolepis | 1 | |
| Leucanthemum rotundifolium | Accepted | Leucanthemum rotundifolium | 1 | |
| Leucanthemum vulgare | Accepted | Leucanthemum vulgare | 2 | |
| Leucojum aestivum | Accepted | Leucojum aestivum | 1 | |
| Leucojum nicaeense | Synonym | Acis nicaeensis | 1 | |
| Leucojum vernum | Accepted | Leucojum vernum | 1 | |
| Leuzea conifera | Accepted | Leuzea conifera | 1 | |
| Levisticum officinale | Accepted | Levisticum officinale | 3 | |
| Leymus arenarius | Accepted | Leymus arenarius | 1 | |
| Leymus innovatus | Accepted | Leymus innovatus | 1 | |
| Leymus mollis | Accepted | Leymus mollis | 1 | |
| Licania blackii | Accepted | Licania blackii | 1 | |
| Licania brittoniana | Synonym | Moquilea brittoniana | 1 | |
| Licania cordata | Accepted | Licania cordata | 1 | |
| Licania densiflora | Accepted | Licania densiflora | 1 | |
| Licania discolor | Accepted | Licania discolor | 1 | |
| Licania egleri | Synonym | Moquilea egleri | 1 | |
| Licania granvillei | Synonym | Leptobalanus granvillei | 1 | |
| Licania guianensis | Synonym | Moquilea guianensis | 1 | |
| Licania humilis | Synonym | Leptobalanus humilis | 1 | |
| Licania hypoleuca | Accepted | Licania hypoleuca | 1 | |
| Licania incana | Accepted | Licania incana | 1 | |
| Licania intrapetiolaris | Synonym | Hymenopus intrapetiolaris | 1 | |
| Licania irwinii | Accepted | Licania irwinii | 1 | |
| Licania kunthiana | Accepted | Licania kunthiana | 1 | |
| Licania laevigata | Synonym | Hymenopus laevigatus | 1 | |
| Licania lata | Synonym | Leptobalanus latus | 1 | |
| Licania latifolia | Synonym | Hymenopus latifolius | 1 | |
| Licania latistipula | Synonym | Hymenopus latistipulus | 1 | |
| Licania laxiflora | Accepted | Licania laxiflora | 1 | |
| Licania licaniiflora | Synonym | Parinariopsis licaniiflora | 1 | |
| Licania longistyla | Synonym | Leptobalanus longistylus | 1 | |
| Licania octandra | Synonym | Leptobalanus octandrus | 1 | |
| Licania orbicularis | Accepted | Licania orbicularis | 1 | |
| Licania pallida | Accepted | Licania pallida | 1 | |
| Licania petrensis | Synonym | Leptobalanus emarginatus | 1 | |
| Ligularia dentata | Accepted | Ligularia dentata | 1 | |
| Ligularia sibirica | Accepted | Ligularia sibirica | 2 | |
| Ligularia stenocephala | Accepted | Ligularia stenocephala | 1 | |
| Ligusticum ferulaceum | Accepted | Ligusticum ferulaceum | 1 | |
| Ligusticum lucidum | Accepted | Ligusticum lucidum | 2 | |
| Ligusticum mutellina | Synonym | Mutellina purpurea | 1 | |
| Ligusticum mutellinoides | Synonym | Neogaya simplex | 1 | |
| Ligusticum scoticum | Accepted | Ligusticum scoticum | 1 | |
| Ligustrum | Accepted | Ligustrum | 1 | |
| Ligustrum lucidum | Accepted | Ligustrum lucidum | 2 | |
| Ligustrum vulgare | Accepted | Ligustrum vulgare | 2 | |
| Lilium bulbiferum | Accepted | Lilium bulbiferum | 1 | |
| Lilium bulbiferum subsp. bulbiferum | Unchecked | 1 | ||
| Lilium bulbiferum subsp. croceum | Synonym | Lilium bulbiferum | 1 | |
| Lilium carniolicum | Accepted | Lilium carniolicum | 1 | |
| Lilium jankae | Accepted | Lilium jankae | 1 | |
| Lilium martagon | Accepted | Lilium martagon | 2 | |
| Lilium pomponium | Accepted | Lilium pomponium | 1 | |
| Limeum obovatum | Accepted | Limeum obovatum | 1 | |
| Limnanthes douglasii | Accepted | Limnanthes douglasii | 1 | |
| Limodorum abortivum | Accepted | Limodorum abortivum | 1 | |
| Limosella aquatica | Accepted | Limosella aquatica | 2 | |
| Linaria alpina subsp. alpina | Unchecked | 1 | ||
| Linaria angustissima | Accepted | Linaria angustissima | 1 | |
| Linaria genistifolia | Accepted | Linaria genistifolia | 1 | |
| Linaria pelisseriana | Accepted | Linaria pelisseriana | 1 | |
| Linaria petraea | Synonym | Linaria alpina | 1 | |
| Linaria repens | Accepted | Linaria repens | 1 | |
| Linaria simplex | Accepted | Linaria simplex | 1 | |
| Linaria supina | Accepted | Linaria supina | 2 | |
| Linaria tonzigii | Accepted | Linaria tonzigii | 1 | |
| Linaria vulgaris | Accepted | Linaria vulgaris | 2 | |
| Lindernia dubia | Accepted | Lindernia dubia | 1 | |
| Lindernia microcalyx | Accepted | Lindernia microcalyx | 1 | |
| Lindernia procumbens | Accepted | Lindernia procumbens | 1 | |
| Linnaea borealis | Accepted | Linnaea borealis | 1 | |
| Linnaea borealis | Accepted | Linnaea borealis | 1 | |
| Linum alpinum | Accepted | Linum alpinum | 2 | |
| Linum alpinum | Accepted | Linum alpinum | 1 | |
| Linum austriacum | Accepted | Linum austriacum | 1 | |
| Linum bienne | Accepted | Linum bienne | 1 | |
| Linum campanulatum | Accepted | Linum campanulatum | 1 | |
| Linum catharticum | Accepted | Linum catharticum | 2 | |
| Linum extraaxillare | Accepted | Linum extraaxillare | 1 | |
| Linum flavum | Accepted | Linum flavum | 1 | |
| Linum hirsutum | Accepted | Linum hirsutum | 1 | |
| Linum hologynum | Accepted | Linum hologynum | 1 | |
| Linum lewisii | Accepted | Linum lewisii | 1 | |
| Linum maritimum | Accepted | Linum maritimum | 1 | |
| Linum narbonense | Accepted | Linum narbonense | 1 | |
| Linum strictum | Accepted | Linum strictum | 1 | |
| Linum strictum subsp. corymbulosum | Synonym | Linum corymbulosum | 1 | |
| Linum suffruticosum subsp. apressum | Synonym | Linum appressum | 1 | |
| Linum tenuifolium | Accepted | Linum tenuifolium | 1 | |
| Linum trigynum | Accepted | Linum trigynum | 1 | |
| Linum uninerve | Accepted | Linum uninerve | 1 | |
| Linum viscosum | Accepted | Linum viscosum | 1 | |
| Liparis loeselii | Accepted | Liparis loeselii | 2 | |
| Listera cordata | Synonym | Neottia cordata | 2 | |
| Listera ovata | Synonym | Neottia ovata | 1 | |
| Lithodora fruticosa | Accepted | Lithodora fruticosa | 1 | |
| Lithospermum officinale | Accepted | Lithospermum officinale | 2 | |
| Littorella uniflora | Accepted | Littorella uniflora | 1 | |
| Lloydia serotina | Synonym | Gagea serotina | 1 | |
| Lobelia dortmanna | Accepted | Lobelia dortmanna | 1 | |
| Lobelia urens | Accepted | Lobelia urens | 1 | |
| Lobularia maritima | Accepted | Lobularia maritima | 1 | |
| Loeflingia hispanica | Accepted | Loeflingia hispanica | 1 | |
| Loiseleuria procumbens | Synonym | Kalmia procumbens | 1 | |
| Lolium multiflorum | Accepted | Lolium multiflorum | 2 | |
| Lolium perenne | Accepted | Lolium perenne | 2 | |
| Lolium rigidum | Accepted | Lolium rigidum | 1 | |
| Lolium temulentum | Accepted | Lolium temulentum | 1 | |
| Lomatogonium carinthiacum | Accepted | Lomatogonium carinthiacum | 1 | |
| Lomatogonium rotatum | Accepted | Lomatogonium rotatum | 1 | |
| Lomelosia graminifolia | Accepted | Lomelosia graminifolia | 1 | |
| Lomelosia simplex | Accepted | Lomelosia simplex | 1 | |
| Lomelosia stellata | Accepted | Lomelosia stellata | 1 | |
| Lonicera alpigena | Accepted | Lonicera alpigena | 1 | |
| Lonicera caerulea | Accepted | Lonicera caerulea | 2 | |
| Lonicera caprifolium | Accepted | Lonicera caprifolium | 1 | |
| Lonicera etrusca | Accepted | Lonicera etrusca | 1 | |
| Lonicera implexa | Accepted | Lonicera implexa | 2 | |
| Lonicera involucrata | Accepted | Lonicera involucrata | 1 | |
| Lonicera japonica | Accepted | Lonicera japonica | 1 | |
| Lonicera nigra | Accepted | Lonicera nigra | 1 | |
| Lonicera periclymenum | Accepted | Lonicera periclymenum | 2 | |
| Lonicera pileata | Synonym | Lonicera ligustrina var. pileata | 1 | |
| Lonicera tatarica | Accepted | Lonicera tatarica | 2 | |
| Lonicera xylosteum | Accepted | Lonicera xylosteum | 2 | |
| Lophopyxis | Accepted | Lophopyxis | 1 | |
| Loranthus europaeus | Accepted | Loranthus europaeus | 2 | |
| Loreya arborescens | Synonym | Bellucia arborescens | 1 | |
| Lotus alpinus | Accepted | Lotus alpinus | 1 | |
| Lotus corniculatus | Accepted | Lotus corniculatus | 4 | |
| Lotus delortii | Synonym | Lotus corniculatus subsp. delortii | 1 | |
| Lotus maritimus | Accepted | Lotus maritimus | 1 | |
| Lotus pedunculatus | Accepted | Lotus pedunculatus | 1 | |
| Lotus tenuis | Accepted | Lotus tenuis | 1 | |
| Loudetia simplex | Accepted | Loudetia simplex | 1 | |
| Ludwigia palustris | Accepted | Ludwigia palustris | 1 | |
| Ludwigia peploides | Accepted | Ludwigia peploides | 1 | |
| Lunaria annua subsp. annua | Synonym | Lunaria annua | 1 | |
| Lunaria annua subsp. pachyrrhiza | Accepted | Lunaria annua subsp. pachyrrhiza | 1 | |
| Lunaria rediviva | Accepted | Lunaria rediviva | 1 | |
| Lupinus albus | Accepted | Lupinus albus | 1 | |
| Lupinus angustifolius | Accepted | Lupinus angustifolius | 1 | |
| Lupinus arcticus | Accepted | Lupinus arcticus | 1 | |
| Lupinus nootkatensis | Accepted | Lupinus nootkatensis | 1 | |
| Lupinus perennis | Accepted | Lupinus perennis | 1 | |
| Lupinus polyphyllus | Accepted | Lupinus polyphyllus | 2 | |
| Luronium natans | Accepted | Luronium natans | 1 | |
| Luzula alpina | Accepted | Luzula alpina | 1 | |
| Luzula alpinopilosa | Accepted | Luzula alpinopilosa | 1 | |
| Luzula alpinopilosa subsp. obscura | Accepted | Luzula alpinopilosa subsp. obscura | 1 | |
| Luzula arcuata | Accepted | Luzula arcuata | 2 | |
| Luzula campestris | Accepted | Luzula campestris | 2 | |
| Luzula confusa | Accepted | Luzula confusa | 1 | |
| Luzula forsteri | Accepted | Luzula forsteri | 1 | |
| Luzula glabrata | Accepted | Luzula glabrata | 1 | |
| Luzula lutea | Accepted | Luzula lutea | 1 | |
| Luzula luzulina | Accepted | Luzula luzulina | 1 | |
| Luzula luzuloides | Accepted | Luzula luzuloides | 2 | |
| Luzula luzuloides subsp. rubella | Accepted | Luzula luzuloides subsp. rubella | 1 | |
| Luzula multiflora | Accepted | Luzula multiflora | 1 | |
| Luzula multiflora subsp. frigida | Accepted | Luzula multiflora subsp. frigida | 1 | |
| Luzula nivalis | Accepted | Luzula nivalis | 1 | |
| Luzula nivea | Accepted | Luzula nivea | 1 | |
| Luzula nutans | Synonym | Luzula pediformis | 1 | |
| Luzula pallidula | Synonym | Luzula pallescens | 1 | |
| Luzula parviflora | Accepted | Luzula parviflora | 1 | |
| Luzula pedemontana | Accepted | Luzula pedemontana | 1 | |
| Luzula pilosa | Accepted | Luzula pilosa | 2 | |
| Luzula sieberi | Synonym | Luzula sylvatica subsp. sieberi | 1 | |
| Luzula spicata | Accepted | Luzula spicata | 2 | |
| Luzula spicata subsp. mutabilis | Synonym | Luzula spicata subsp. conglomerata | 1 | |
| Luzula sudetica | Accepted | Luzula sudetica | 2 | |
| Luzula sylvatica | Accepted | Luzula sylvatica | 2 | |
| Luzula wahlenbergii | Accepted | Luzula wahlenbergii | 1 | |
| Lychnis flos-cuculi | Synonym | Silene flos-cuculi | 2 | |
| Lychnis viscaria | Synonym | Silene viscaria | 1 | |
| Lycium barbarum | Accepted | Lycium barbarum | 1 | |
| Lycium chinense | Accepted | Lycium chinense | 1 | |
| Lycopersicon esculentum | Synonym | Solanum lycopersicum | 1 | |
| Lycopodiella inundata | Accepted | Lycopodiella inundata | 2 | |
| Lycopodium annotinum | Accepted | Lycopodium annotinum | 2 | |
| Lycopodium annotinum subsp. alpestre | Synonym | Lycopodium dubium | 1 | |
| Lycopodium annotinum subsp. annotinum | Synonym | Lycopodium annotinum | 1 | |
| Lycopodium clavatum subsp. clavatum | Synonym | Lycopodium clavatum | 1 | |
| Lycopodium clavatum var. clavatum | Synonym | Lycopodium clavatum | 1 | |
| Lycopus europaeus | Accepted | Lycopus europaeus | 2 | |
| Lycopus europaeus subsp. mollis | Synonym | Lycopus europaeus | 1 | |
| Lysimachia nemorum | Accepted | Lysimachia nemorum | 2 | |
| Lysimachia nummularia | Accepted | Lysimachia nummularia | 1 | |
| Lysimachia punctata | Accepted | Lysimachia punctata | 2 | |
| Lysimachia thyrsiflora | Accepted | Lysimachia thyrsiflora | 3 | |
| Lysimachia vulgaris | Accepted | Lysimachia vulgaris | 2 | |
| Lythrum hyssopifolia | Accepted | Lythrum hyssopifolia | 1 | |
| Lythrum portula | Accepted | Lythrum portula | 1 | |
| Lythrum salicaria | Accepted | Lythrum salicaria | 3 | |
| Lythrum tribracteatum | Accepted | Lythrum tribracteatum | 1 | |
| Maclura tinctoria | Accepted | Maclura tinctoria | 1 | |
| Macoubea guianensis | Accepted | Macoubea guianensis | 1 | |
| Madhuca curtisii | Accepted | Madhuca curtisii | 1 | |
| Madhuca oblongifolia | Accepted | Madhuca oblongifolia | 1 | |
| Madhuca sarawakensis | Accepted | Madhuca sarawakensis | 1 | |
| Magnistipula bimarsupiata | Accepted | Magnistipula bimarsupiata | 1 | |
| Magnolia stellata | Accepted | Magnolia stellata | 1 | |
| Mahonia aquifolium | Synonym | Berberis aquifolium | 2 | |
| Mahurea palustris | Accepted | Mahurea palustris | 1 | |
| Maianthemum bifolium | Accepted | Maianthemum bifolium | 3 | |
| Malaxis monophyllos | Accepted | Malaxis monophyllos | 1 | |
| Malouetia guianensis | Synonym | Malouetia tamaquarina | 1 | |
| Malus fusca | Accepted | Malus fusca | 1 | |
| Malus sylvestris | Accepted | Malus sylvestris | 2 | |
| Malva alcea | Accepted | Malva alcea | 1 | |
| Malva moschata | Accepted | Malva moschata | 1 | |
| Malva neglecta | Accepted | Malva neglecta | 1 | |
| Malva parviflora | Accepted | Malva parviflora | 1 | |
| Malva pusilla | Accepted | Malva pusilla | 1 | |
| Malva sylvestris | Accepted | Malva sylvestris | 1 | |
| Malva verticillata | Accepted | Malva verticillata | 1 | |
| Maquira calophylla | Accepted | Maquira calophylla | 1 | |
| Maranthes kerstingii | Accepted | Maranthes kerstingii | 1 | |
| Marcgravia | Accepted | Marcgravia | 1 | |
| Marlierea eugeniopsoides | Synonym | Myrcia eugeniopsoides | 1 | |
| Marlierea obscura | Synonym | Myrcia neoobscura | 1 | |
| Marlierea suaveolens | Synonym | Myrcia neosuaveolens | 1 | |
| Marlierea tomentosa | Synonym | Myrcia strigipes | 1 | |
| Marrubium vulgare | Accepted | Marrubium vulgare | 1 | |
| Marsilea quadrifolia | Accepted | Marsilea quadrifolia | 1 | |
| Matayba laevigata | Synonym | Matayba guianensis | 1 | |
| Matricaria chamomilla | Accepted | Matricaria chamomilla | 1 | |
| Matricaria discoidea | Accepted | Matricaria discoidea | 1 | |
| Matricaria recutita | Unchecked | 1 | ||
| Matteuccia struthiopteris | Synonym | Onoclea struthiopteris | 2 | |
| Matthiola carnica | Synonym | Matthiola fruticulosa subsp. valesiaca | 1 | |
| Matthiola fruticulosa | Accepted | Matthiola fruticulosa | 1 | |
| Matthiola incana | Accepted | Matthiola incana | 1 | |
| Matthiola valesiaca | Synonym | Matthiola fruticulosa subsp. valesiaca | 1 | |
| Mayaca | Accepted | Mayaca | 1 | |
| Mayna odorata | Accepted | Mayna odorata | 1 | |
| Meconopsis cambrica | Synonym | Papaver cambricum | 2 | |
| Medicago arabica | Accepted | Medicago arabica | 1 | |
| Medicago carstiensis | Accepted | Medicago carstiensis | 1 | |
| Medicago falcata | Accepted | Medicago falcata | 1 | |
| Medicago littoralis | Accepted | Medicago littoralis | 1 | |
| Medicago lupulina | Accepted | Medicago lupulina | 2 | |
| Medicago minima | Accepted | Medicago minima | 1 | |
| Medicago orbicularis | Accepted | Medicago orbicularis | 1 | |
| Medicago pironae | Accepted | Medicago pironae | 1 | |
| Medicago polymorpha | Accepted | Medicago polymorpha | 1 | |
| Medicago prostrata | Accepted | Medicago prostrata | 1 | |
| Medicago rigidula | Accepted | Medicago rigidula | 1 | |
| Medicago sativa | Accepted | Medicago sativa | 2 | |
| Medicago sativa subsp. glomerata | Unchecked | 1 | ||
| Melampyrum arvense | Accepted | Melampyrum arvense | 1 | |
| Melampyrum bihariense | Accepted | Melampyrum bihariense | 1 | |
| Melampyrum cristatum | Unchecked | 2 | ||
| Melampyrum italicum | Accepted | Melampyrum italicum | 1 | |
| Melampyrum nemorosum | Unchecked | 1 | ||
| Melampyrum nemorosum subsp. catalaunicum | Accepted | Melampyrum nemorosum subsp. catalaunicum | 1 | |
| Melampyrum pratense | Accepted | Melampyrum pratense | 2 | |
| Melampyrum saxosum | Accepted | Melampyrum saxosum | 1 | |
| Melampyrum subalpinum | Accepted | Melampyrum subalpinum | 1 | |
| Melampyrum sylvaticum | Accepted | Melampyrum sylvaticum | 3 | |
| Melianthus major | Accepted | Melianthus major | 1 | |
| Melica amethystina | Accepted | Melica amethystina | 1 | |
| Melica ciliata | Accepted | Melica ciliata | 1 | |
| Melica ciliata subsp. magnolii | Synonym | Melica ciliata | 1 | |
| Melica minuta | Accepted | Melica minuta | 1 | |
| Melica nutans | Accepted | Melica nutans | 2 | |
| Melica transsilvanica | Accepted | Melica transsilvanica | 1 | |
| Melica uniflora | Accepted | Melica uniflora | 3 | |
| Melicoccus pedicellaris | Accepted | Melicoccus pedicellaris | 1 | |
| Melilotus albus | Accepted | Melilotus albus | 2 | |
| Melilotus altissimus | Accepted | Melilotus altissimus | 1 | |
| Melilotus indicus | Accepted | Melilotus indicus | 1 | |
| Melilotus neapolitanus | Accepted | Melilotus neapolitanus | 1 | |
| Melilotus officinalis | Accepted | Melilotus officinalis | 2 | |
| Melilotus sulcatus | Accepted | Melilotus sulcatus | 1 | |
| Melinis minutiflora | Accepted | Melinis minutiflora | 1 | |
| Melissa officinalis | Accepted | Melissa officinalis | 1 | |
| Melittis melissophyllum | Accepted | Melittis melissophyllum | 1 | |
| Menispermum canadense | Accepted | Menispermum canadense | 1 | |
| Mentha aquatica | Accepted | Mentha aquatica | 2 | |
| Mentha arvensis | Accepted | Mentha arvensis | 2 | |
| Mentha longifolia | Accepted | Mentha longifolia | 1 | |
| Mentha pulegium | Accepted | Mentha pulegium | 1 | |
| Mentha spicata | Accepted | Mentha spicata | 1 | |
| Mentha suaveolens | Accepted | Mentha suaveolens | 1 | |
| Menyanthes trifoliata | Accepted | Menyanthes trifoliata | 3 | |
| Mercurialis annua | Accepted | Mercurialis annua | 1 | |
| Mercurialis ovata | Accepted | Mercurialis ovata | 1 | |
| Mercurialis perennis | Accepted | Mercurialis perennis | 2 | |
| Merendera montana | Synonym | Colchicum montanum | 1 | |
| Mertensia drummondii | Synonym | Mertensia sibirica var. drummondii | 1 | |
| Mertensia maritima | Accepted | Mertensia maritima | 1 | |
| Merxmuellera tsaratananensis | Accepted | Merxmuellera tsaratananensis | 1 | |
| Mespilus germanica | Accepted | Mespilus germanica | 1 | |
| Metrodorea nigra | Accepted | Metrodorea nigra | 1 | |
| Meum athamanticum | Accepted | Meum athamanticum | 1 | |
| Mibora minima | Accepted | Mibora minima | 1 | |
| Miconia acuminata | Accepted | Miconia acuminata | 1 | |
| Miconia albicans | Accepted | Miconia albicans | 1 | |
| Miconia cabucu | Synonym | Miconia formosa | 1 | |
| Miconia chartacea | Synonym | Miconia flammea | 1 | |
| Miconia cinnamomifolia | Accepted | Miconia cinnamomifolia | 2 | |
| Miconia pusilliflora | Accepted | Miconia pusilliflora | 1 | |
| Micranthes ferruginea | Accepted | Micranthes ferruginea | 1 | |
| Micranthes foliolosa | Accepted | Micranthes foliolosa | 1 | |
| Micranthes hieraciifolia | Accepted | Micranthes hieraciifolia | 2 | |
| Micranthes lyallii | Accepted | Micranthes lyallii | 1 | |
| Micranthes nivalis | Accepted | Micranthes nivalis | 1 | |
| Micranthes reflexa | Accepted | Micranthes reflexa | 1 | |
| Micranthes stellaris | Accepted | Micranthes stellaris | 1 | |
| Micranthes tenuis | Accepted | Micranthes tenuis | 1 | |
| Microdesmis puberula | Accepted | Microdesmis puberula | 1 | |
| Micromeria marginata | Accepted | Micromeria marginata | 1 | |
| Micromeria thymifolia | Synonym | Clinopodium thymifolium | 1 | |
| Micropholis cayennensis | Accepted | Micropholis cayennensis | 1 | |
| Micropholis egensis | Accepted | Micropholis egensis | 1 | |
| Micropholis longipedicellata | Accepted | Micropholis longipedicellata | 1 | |
| Micropholis madeirensis | Accepted | Micropholis madeirensis | 1 | |
| Micropholis melinoniana | Accepted | Micropholis melinoniana | 1 | |
| Micropholis mensalis | Accepted | Micropholis mensalis | 1 | |
| Micropholis obscura | Accepted | Micropholis obscura | 1 | |
| Micropholis porphyrocarpa | Accepted | Micropholis porphyrocarpa | 1 | |
| Micropholis venulosa | Accepted | Micropholis venulosa | 2 | |
| Micropus erectus | Synonym | Bombycilaena discolor | 1 | |
| Micropyrum tenellum | Accepted | Micropyrum tenellum | 1 | |
| Microrrhinum litorale | Synonym | Chaenorhinum litorale | 1 | |
| Milium effusum | Accepted | Milium effusum | 3 | |
| Mimulus guttatus | Synonym | Erythranthe guttata | 1 | |
| Minuartia arctica | Accepted | Minuartia arctica | 1 | |
| Minuartia austriaca | Accepted | Minuartia austriaca | 1 | |
| Minuartia biflora | Accepted | Minuartia biflora | 2 | |
| Minuartia capillacea | Accepted | Minuartia capillacea | 1 | |
| Minuartia cherlerioides | Accepted | Minuartia cherlerioides | 1 | |
| Minuartia cherlerioides subsp. rionii | Accepted | Minuartia cherlerioides subsp. rionii | 1 | |
| Minuartia glomerata | Accepted | Minuartia glomerata | 1 | |
| Minuartia grignensis | Accepted | Minuartia grignensis | 1 | |
| Minuartia groenlandica | Accepted | Minuartia groenlandica | 1 | |
| Minuartia hybrida | Accepted | Minuartia hybrida | 1 | |
| Minuartia hybrida subsp. tenuifolia | Synonym | Minuartia hybrida | 1 | |
| Minuartia laricifolia | Accepted | Minuartia laricifolia | 2 | |
| Minuartia laricifolia subsp. kitaibelii | Accepted | Minuartia laricifolia subsp. kitaibelii | 1 | |
| Minuartia macrocarpa | Accepted | Minuartia macrocarpa | 1 | |
| Minuartia mediterranea | Accepted | Minuartia mediterranea | 1 | |
| Minuartia recurva | Accepted | Minuartia recurva | 1 | |
| Minuartia rossii | Accepted | Minuartia rossii | 1 | |
| Minuartia rostrata | Synonym | Minuartia mutabilis | 1 | |
| Minuartia rubella | Accepted | Minuartia rubella | 2 | |
| Minuartia rubra | Accepted | Minuartia rubra | 1 | |
| Minuartia rupestris | Accepted | Minuartia rupestris | 1 | |
| Minuartia rupestris subsp. clementei | Accepted | Minuartia rupestris subsp. clementei | 1 | |
| Minuartia sedoides | Accepted | Minuartia sedoides | 1 | |
| Minuartia setacea | Accepted | Minuartia setacea | 1 | |
| Minuartia stricta | Accepted | Minuartia stricta | 1 | |
| Minuartia verna | Accepted | Minuartia verna | 1 | |
| Minuartia villarii | Unchecked | 1 | ||
| Minuartia viscosa | Accepted | Minuartia viscosa | 1 | |
| Misodendrum punctulatum | Accepted | Misodendrum punctulatum | 1 | |
| Misopates orontium | Accepted | Misopates orontium | 1 | |
| Moehringia bavarica | Accepted | Moehringia bavarica | 1 | |
| Moehringia ciliata | Accepted | Moehringia ciliata | 1 | |
| Moehringia concarenae | Unchecked | 1 | ||
| Moehringia dielsiana | Accepted | Moehringia dielsiana | 1 | |
| Moehringia glaucovirens | Accepted | Moehringia glaucovirens | 1 | |
| Moehringia intermedia | Accepted | Moehringia intermedia | 1 | |
| Moehringia lateriflora | Accepted | Moehringia lateriflora | 1 | |
| Moehringia lebrunii | Accepted | Moehringia lebrunii | 1 | |
| Moehringia muscosa | Accepted | Moehringia muscosa | 1 | |
| Moehringia pendula | Accepted | Moehringia pendula | 1 | |
| Moehringia sedoides | Accepted | Moehringia sedoides | 1 | |
| Moehringia trinervia | Accepted | Moehringia trinervia | 1 | |
| Moehringia villosa | Accepted | Moehringia villosa | 1 | |
| Moenchia erecta | Accepted | Moenchia erecta | 1 | |
| Moenchia mantica | Accepted | Moenchia mantica | 1 | |
| Molineria latifolia | Synonym | Curculigo latifolia | 1 | |
| Molinia arundinacea | Accepted | Molinia arundinacea | 1 | |
| Molinia caerulea | Accepted | Molinia caerulea | 2 | |
| Mollinedia widgrenii | Accepted | Mollinedia widgrenii | 1 | |
| Molopospermum peloponnesiacum | Accepted | Molopospermum peloponnesiacum | 1 | |
| Moneses uniflora | Accepted | Moneses uniflora | 2 | |
| Monotagma contractum | Accepted | Monotagma contractum | 1 | |
| Monotropa hypophegea | Synonym | Monotropa hypopitys | 1 | |
| Monotropa hypopitys | Accepted | Monotropa hypopitys | 2 | |
| Montia fontana | Accepted | Montia fontana | 1 | |
| Montia fontana subsp. chondrosperma | Accepted | Montia fontana subsp. chondrosperma | 1 | |
| Moringa hildebrandtii | Accepted | Moringa hildebrandtii | 1 | |
| Moronobea coccinea | Accepted | Moronobea coccinea | 1 | |
| Morus alba | Accepted | Morus alba | 1 | |
| Morus nigra | Accepted | Morus nigra | 1 | |
| Muhlenbergia schreberi | Accepted | Muhlenbergia schreberi | 1 | |
| Mulgedium sibiricum | Synonym | Lactuca sibirica | 1 | |
| Murbeckiella pinnatifida | Accepted | Murbeckiella pinnatifida | 1 | |
| Muscari botryoides | Accepted | Muscari botryoides | 2 | |
| Muscari comosum | Synonym | Leopoldia comosa | 1 | |
| Muscari neglectum | Accepted | Muscari neglectum | 1 | |
| Muscari racemosum | Accepted | Muscari racemosum | 1 | |
| Mutellina purpurea | Accepted | Mutellina purpurea | 1 | |
| Myagrum perfoliatum | Accepted | Myagrum perfoliatum | 1 | |
| Mycelis muralis | Synonym | Lactuca muralis | 2 | |
| Myodocarpus pinnatus | Accepted | Myodocarpus pinnatus | 1 | |
| Myosotis alpestris | Accepted | Myosotis alpestris | 1 | |
| Myosotis arvensis | Accepted | Myosotis arvensis | 1 | |
| Myosotis caespitosa | Synonym | Myosotis laxa subsp. caespitosa | 1 | |
| Myosotis decumbens | Accepted | Myosotis decumbens | 1 | |
| Myosotis discolor | Accepted | Myosotis discolor | 1 | |
| Myosotis laxa subsp. baltica | Accepted | Myosotis laxa subsp. baltica | 1 | |
| Myosotis laxa subsp. caespitosa | Accepted | Myosotis laxa subsp. caespitosa | 1 | |
| Myosotis minutiflora | Accepted | Myosotis minutiflora | 1 | |
| Myosotis sparsiflora | Accepted | Myosotis sparsiflora | 1 | |
| Myosoton aquaticum | Synonym | Stellaria aquatica | 2 | |
| Myosurus minimus | Synonym | Ranunculus minimus | 2 | |
| Myrceugenia kleinii | Accepted | Myrceugenia kleinii | 1 | |
| Myrceugenia myrcioides | Accepted | Myrceugenia myrcioides | 1 | |
| Myrceugenia pilotantha | Accepted | Myrceugenia pilotantha | 1 | |
| Myrcia anacardiifolia | Accepted | Myrcia anacardiifolia | 1 | |
| Myrcia brasiliensis | Synonym | Myrcia florida | 2 | |
| Myrcia hebepetala | Accepted | Myrcia hebepetala | 1 | |
| Myrcia ilheosensis | Synonym | Myrcia trichantha | 1 | |
| Myrcia macrocarpa | Accepted | Myrcia macrocarpa | 1 | |
| Myrcia multiflora | Accepted | Myrcia multiflora | 1 | |
| Myrcianthes pungens | Accepted | Myrcianthes pungens | 1 | |
| Myrcia pubipetala | Accepted | Myrcia pubipetala | 1 | |
| Myrcia pulchra | Synonym | Myrcia subcordata | 1 | |
| Myrciaria floribunda | Accepted | Myrciaria floribunda | 3 | |
| Myrcia spectabilis | Accepted | Myrcia spectabilis | 1 | |
| Myrcia venulosa | Accepted | Myrcia venulosa | 1 | |
| Myrica gale | Accepted | Myrica gale | 1 | |
| Myricaria germanica | Accepted | Myricaria germanica | 2 | |
| Myriophyllum alterniflorum | Accepted | Myriophyllum alterniflorum | 3 | |
| Myriophyllum aquaticum | Accepted | Myriophyllum aquaticum | 1 | |
| Myriophyllum sibiricum | Accepted | Myriophyllum sibiricum | 1 | |
| Myriophyllum spicatum | Accepted | Myriophyllum spicatum | 2 | |
| Myriophyllum verticillatum | Accepted | Myriophyllum verticillatum | 2 | |
| Myrrhis odorata | Accepted | Myrrhis odorata | 1 | |
| Myrtus communis | Accepted | Myrtus communis | 1 | |
| Najas marina | Accepted | Najas marina | 2 | |
| Najas minor | Accepted | Najas minor | 1 | |
| Narcissus assoanus | Accepted | Narcissus assoanus | 1 | |
| Narcissus dubius | Accepted | Narcissus dubius | 1 | |
| Narcissus poeticus | Accepted | Narcissus poeticus | 1 | |
| Narcissus pseudonarcissus | Accepted | Narcissus pseudonarcissus | 2 | |
| Narcissus radiiflorus | Synonym | Narcissus poeticus subsp. radiiflorus | 1 | |
| Narcissus tazetta | Accepted | Narcissus tazetta | 1 | |
| Nardus stricta | Accepted | Nardus stricta | 2 | |
| Narthecium ossifragum | Accepted | Narthecium ossifragum | 1 | |
| Nasturtium microphyllum | Accepted | Nasturtium microphyllum | 1 | |
| Nasturtium officinale | Accepted | Nasturtium officinale | 1 | |
| Naucleopsis guianensis | Accepted | Naucleopsis guianensis | 1 | |
| Nectandra membranacea | Accepted | Nectandra membranacea | 1 | |
| Nectandra reticulata | Unchecked | 1 | ||
| Neea floribunda | Accepted | Neea floribunda | 1 | |
| Nelumbo nucifera | Accepted | Nelumbo nucifera | 1 | |
| Nemophila menziesii | Accepted | Nemophila menziesii | 1 | |
| Nemuaron vieillardii | Accepted | Nemuaron vieillardii | 1 | |
| Neodillenia | Accepted | Neodillenia | 1 | |
| Neomitranthes glomerata | Accepted | Neomitranthes glomerata | 2 | |
| Neotinea maculata | Accepted | Neotinea maculata | 1 | |
| Neottia nidus-avis | Accepted | Neottia nidus-avis | 1 | |
| Neottia ovata | Accepted | Neottia ovata | 2 | |
| Nepeta cataria | Accepted | Nepeta cataria | 1 | |
| Nepeta nepetella | Accepted | Nepeta nepetella | 1 | |
| Nepeta nuda | Accepted | Nepeta nuda | 1 | |
| Nerium oleander | Accepted | Nerium oleander | 1 | |
| Neslia paniculata subsp. paniculata | Synonym | Neslia paniculata | 1 | |
| Neslia paniculata subsp. thracica | Accepted | Neslia paniculata subsp. thracica | 1 | |
| Nestegis apetala | Accepted | Nestegis apetala | 1 | |
| Nestegis cunninghamii | Accepted | Nestegis cunninghamii | 1 | |
| Neurada procumbens | Accepted | Neurada procumbens | 1 | |
| Nicandra physalodes | Accepted | Nicandra physalodes | 1 | |
| Nicotiana alata | Accepted | Nicotiana alata | 1 | |
| Nigella arvensis | Accepted | Nigella arvensis | 1 | |
| Nigella damascena | Accepted | Nigella damascena | 1 | |
| Nigritella archiducis-joannis | Synonym | Gymnadenia archiducis-joannis | 1 | |
| Nigritella austriaca | Synonym | Gymnadenia austriaca | 1 | |
| Nigritella corneliana | Synonym | Gymnadenia corneliana | 1 | |
| Nigritella dolomitensis | Synonym | Gymnadenia dolomitensis | 1 | |
| Nigritella lithopolitanica | Synonym | Gymnadenia lithopolitanica | 1 | |
| Nigritella rhellicani | Synonym | Gymnadenia rhellicani | 1 | |
| Nigritella rubra | Synonym | Gymnadenia miniata | 1 | |
| Nigritella stiriaca | Synonym | Gymnadenia stiriaca | 1 | |
| Nigritella widderi | Synonym | Gymnadenia widderi | 1 | |
| Noccaea caerulescens | Accepted | Noccaea caerulescens | 1 | |
| Noccaea dacica subsp. dacica | Synonym | Noccaea dacica | 1 | |
| Noccaea kovatsii | Accepted | Noccaea kovatsii | 1 | |
| Nonea erecta | Synonym | Nonea pulla | 1 | |
| Nonea pallens | Accepted | Nonea pallens | 1 | |
| Noronhia brevituba | Accepted | Noronhia brevituba | 1 | |
| Noronhia lowryi | Accepted | Noronhia lowryi | 2 | |
| Notholaena marantae | Synonym | Hemionitis marantae | 1 | |
| Nuphar lutea | Accepted | Nuphar lutea | 2 | |
| Nuphar pumila | Accepted | Nuphar pumila | 2 | |
| Nymphaea alba | Accepted | Nymphaea alba | 2 | |
| Nymphoides peltata | Accepted | Nymphoides peltata | 1 | |
| Ocotea aciphylla | Accepted | Ocotea aciphylla | 1 | |
| Ocotea catharinensis | Accepted | Ocotea catharinensis | 1 | |
| Ocotea corymbosa | Accepted | Ocotea corymbosa | 1 | |
| Ocotea diospyrifolia | Accepted | Ocotea diospyrifolia | 1 | |
| Ocotea dispersa | Accepted | Ocotea dispersa | 2 | |
| Ocotea elegans | Accepted | Ocotea elegans | 1 | |
| Ocotea indecora | Accepted | Ocotea indecora | 1 | |
| Ocotea mosenii | Accepted | Ocotea mosenii | 1 | |
| Ocotea pulchra | Synonym | Ocotea lancifolia | 1 | |
| Ocotea silvestris | Accepted | Ocotea silvestris | 1 | |
| Ocotea subterminalis | Accepted | Ocotea subterminalis | 1 | |
| Ocotea velutina | Accepted | Ocotea velutina | 1 | |
| Odontites glutinosus | Accepted | Odontites glutinosus | 1 | |
| Odontites lanceolatus | Accepted | Odontites lanceolatus | 1 | |
| Odontites luteus | Unchecked | 1 | ||
| Odontites vernus | Accepted | Odontites vernus | 1 | |
| Odontites viscosus | Accepted | Odontites viscosus | 2 | |
| Odontites vulgaris | Accepted | Odontites vulgaris | 1 | |
| Oenanthe aquatica | Accepted | Oenanthe aquatica | 1 | |
| Oenanthe fistulosa | Accepted | Oenanthe fistulosa | 1 | |
| Oenanthe fluviatilis | Accepted | Oenanthe fluviatilis | 1 | |
| Oenanthe lachenalii | Accepted | Oenanthe lachenalii | 1 | |
| Oenanthe peucedanifolia | Accepted | Oenanthe peucedanifolia | 1 | |
| Oenocarpus bacaba | Accepted | Oenocarpus bacaba | 1 | |
| Oenothera biennis | Accepted | Oenothera biennis | 1 | |
| Oenothera × fallax | Accepted | Oenothera × fallax | 1 | |
| Oenothera glazioviana | Accepted | Oenothera glazioviana | 1 | |
| Oenothera parviflora | Accepted | Oenothera parviflora | 1 | |
| Oenothera pycnocarpa | Synonym | Oenothera biennis | 1 | |
| Oenothera rosea | Accepted | Oenothera rosea | 1 | |
| Oenothera villosa | Accepted | Oenothera villosa | 1 | |
| Oldfieldia africana | Accepted | Oldfieldia africana | 1 | |
| Olea capensis | Accepted | Olea capensis | 1 | |
| Olea europaea | Accepted | Olea europaea | 1 | |
| Olea europaea subsp. cuspidata | Accepted | Olea europaea subsp. cuspidata | 1 | |
| Olea exasperata | Accepted | Olea exasperata | 1 | |
| Olea lancea | Accepted | Olea lancea | 1 | |
| Olea perrieri | Synonym | Olea capensis subsp. macrocarpa | 1 | |
| Omalotheca norvegica | Accepted | Omalotheca norvegica | 2 | |
| Omalotheca supina | Accepted | Omalotheca supina | 1 | |
| Omalotheca sylvatica | Accepted | Omalotheca sylvatica | 1 | |
| Omphalodes verna | Accepted | Omphalodes verna | 1 | |
| Onobrychis alba | Accepted | Onobrychis alba | 1 | |
| Onobrychis arenaria | Accepted | Onobrychis arenaria | 1 | |
| Onobrychis caput-galli | Accepted | Onobrychis caput-galli | 1 | |
| Onobrychis montana | Accepted | Onobrychis montana | 1 | |
| Onobrychis montana var. transsilvanica | Synonym | Onobrychis montana subsp. montana | 1 | |
| Onobrychis saxatilis | Accepted | Onobrychis saxatilis | 1 | |
| Onobrychis supina | Accepted | Onobrychis supina | 1 | |
| Onobrychis viciifolia | Accepted | Onobrychis viciifolia | 1 | |
| Ononis arvensis | Accepted | Ononis arvensis | 1 | |
| Ononis breviflora | Synonym | Ononis viscosa subsp. breviflora | 1 | |
| Ononis cristata | Accepted | Ononis cristata | 1 | |
| Ononis fruticosa | Accepted | Ononis fruticosa | 1 | |
| Ononis minutissima | Accepted | Ononis minutissima | 1 | |
| Ononis natrix | Accepted | Ononis natrix | 1 | |
| Ononis pusilla | Accepted | Ononis pusilla | 1 | |
| Ononis reclinata | Accepted | Ononis reclinata | 1 | |
| Ononis repens | Synonym | Ononis spinosa subsp. procurrens | 1 | |
| Ononis rotundifolia | Accepted | Ononis rotundifolia | 1 | |
| Ononis spinosa | Accepted | Ononis spinosa | 2 | |
| Ononis spinosa | Accepted | Ononis spinosa | 1 | |
| Ononis striata | Accepted | Ononis striata | 1 | |
| Onopordum acanthium | Accepted | Onopordum acanthium | 1 | |
| Onopordum illyricum | Accepted | Onopordum illyricum | 1 | |
| Onosma fastigiata | Accepted | Onosma fastigiata | 1 | |
| Onosma pseudoarenaria | Accepted | Onosma pseudoarenaria | 1 | |
| Onosma visianii | Accepted | Onosma visianii | 1 | |
| Ophioglossum vulgatum | Accepted | Ophioglossum vulgatum | 2 | |
| Ophrys apifera | Accepted | Ophrys apifera | 1 | |
| Ophrys arachnitiformis | Accepted | Ophrys arachnitiformis | 1 | |
| Ophrys araneola | Synonym | Ophrys sphegodes subsp. araneola | 1 | |
| Ophrys drumana | Synonym | Ophrys flavicans | 1 | |
| Ophrys fusca | Accepted | Ophrys fusca | 1 | |
| Ophrys heterochila | Accepted | Ophrys heterochila | 1 | |
| Ophrys insectifera | Accepted | Ophrys insectifera | 1 | |
| Ophrys lupercalis | Synonym | Ophrys fusca subsp. fusca | 1 | |
| Ophrys lutea | Accepted | Ophrys lutea | 1 | |
| Ophrys saratoi | Synonym | Ophrys flavicans | 1 | |
| Ophrys scolopax | Accepted | Ophrys scolopax | 1 | |
| Ophrys sphegodes | Accepted | Ophrys sphegodes | 1 | |
| Ophrys sphegodes subsp. atrata | Accepted | Ophrys sphegodes subsp. atrata | 1 | |
| Oplismenus gracillimus | Synonym | Oplismenus burmanni | 1 | |
| Oplismenus undulatifolius | Accepted | Oplismenus undulatifolius | 1 | |
| Opopanax chironium | Unchecked | 1 | ||
| Opuntia humifusa | Accepted | Opuntia humifusa | 1 | |
| Opuntia imbricata | Synonym | Cylindropuntia imbricata | 1 | |
| Orchis coriophora subsp. fragrans | Synonym | Anacamptis coriophora | 1 | |
| Orchis laxiflora | Synonym | Anacamptis palustris | 1 | |
| Orchis mascula | Accepted | Orchis mascula | 1 | |
| Orchis mascula subsp. signifera | Synonym | Orchis mascula subsp. speciosa | 1 | |
| Orchis militaris | Accepted | Orchis militaris | 1 | |
| Orchis morio subsp. morio | Synonym | Anacamptis boryi | 1 | |
| Orchis morio subsp. picta | Synonym | Anacamptis morio subsp. picta | 1 | |
| Orchis pallens | Accepted | Orchis pallens | 1 | |
| Orchis palustris | Synonym | Anacamptis palustris | 1 | |
| Orchis papilionacea | Synonym | Anacamptis papilionacea | 1 | |
| Orchis provincialis | Accepted | Orchis provincialis | 1 | |
| Orchis purpurea | Accepted | Orchis purpurea | 1 | |
| Orchis simia | Accepted | Orchis simia | 1 | |
| Orchis spitzelii | Accepted | Orchis spitzelii | 1 | |
| Orchis tridentata | Synonym | Neotinea tridentata | 1 | |
| Orchis ustulata | Synonym | Neotinea ustulata | 1 | |
| Oreochloa disticha | Accepted | Oreochloa disticha | 1 | |
| Oreochloa seslerioides | Accepted | Oreochloa seslerioides | 1 | |
| Oreopteris limbosperma | Synonym | Thelypteris limbosperma | 2 | |
| Origanum vulgare | Accepted | Origanum vulgare | 2 | |
| Orlaya daucoides | Accepted | Orlaya daucoides | 1 | |
| Orlaya grandiflora | Accepted | Orlaya grandiflora | 1 | |
| Ormosia flava | Accepted | Ormosia flava | 1 | |
| Ornithogalum angustifolium | Synonym | Ornithogalum graminifolium | 1 | |
| Ornithogalum brevistylum | Synonym | Ornithogalum pyramidale | 1 | |
| Ornithogalum divergens | Accepted | Ornithogalum divergens | 1 | |
| Ornithogalum gussonei | Accepted | Ornithogalum gussonei | 1 | |
| Ornithogalum narbonense | Accepted | Ornithogalum narbonense | 1 | |
| Ornithogalum nutans | Accepted | Ornithogalum nutans | 1 | |
| Ornithogalum pyrenaicum subsp. pyrenaicum | Unchecked | 1 | ||
| Ornithogalum sphaerocarpum | Accepted | Ornithogalum sphaerocarpum | 1 | |
| Ornithogalum umbellatum | Accepted | Ornithogalum umbellatum | 1 | |
| Ornithopus compressus | Accepted | Ornithopus compressus | 1 | |
| Ornithopus perpusillus | Accepted | Ornithopus perpusillus | 2 | |
| Ornithopus sativus | Accepted | Ornithopus sativus | 1 | |
| Orobanche alba | Accepted | Orobanche alba | 1 | |
| Orobanche alsatica subsp. alsatica | Unchecked | 1 | ||
| Orobanche amethystea | Accepted | Orobanche amethystea | 1 | |
| Orobanche arenaria | Accepted | Orobanche arenaria | 1 | |
| Orobanche artemisiae-campestris | Accepted | Orobanche artemisiae-campestris | 1 | |
| Orobanche bartlingii | Accepted | Orobanche bartlingii | 1 | |
| Orobanche caryophyllacea | Accepted | Orobanche caryophyllacea | 1 | |
| Orobanche crenata | Accepted | Orobanche crenata | 1 | |
| Orobanche elatior | Accepted | Orobanche elatior | 1 | |
| Orobanche flava | Accepted | Orobanche flava | 1 | |
| Orobanche gracilis | Accepted | Orobanche gracilis | 1 | |
| Orobanche hederae | Accepted | Orobanche hederae | 1 | |
| Orobanche laevis | Unchecked | 1 | ||
| Orobanche laserpitii-sileris | Accepted | Orobanche laserpitii-sileris | 1 | |
| Orobanche lucorum | Synonym | Orobanche rubi | 1 | |
| Orobanche lutea | Accepted | Orobanche lutea | 1 | |
| Orobanche minor | Accepted | Orobanche minor | 1 | |
| Orobanche ozanonis | Synonym | Orobanche serbica | 1 | |
| Orobanche picridis | Accepted | Orobanche picridis | 1 | |
| Orobanche purpurea | Accepted | Orobanche purpurea | 1 | |
| Orobanche ramosa subsp. nana | Synonym | Orobanche nana | 1 | |
| Orobanche rapum-genistae | Accepted | Orobanche rapum-genistae | 1 | |
| Orobanche reticulata | Accepted | Orobanche reticulata | 1 | |
| Orobanche rosmarina | Accepted | Orobanche rosmarina | 1 | |
| Orobanche salviae | Accepted | Orobanche salviae | 1 | |
| Orobanche teucrii | Accepted | Orobanche teucrii | 1 | |
| Orthilia secunda | Accepted | Orthilia secunda | 2 | |
| Osmanthus americanus | Synonym | Cartrema americana | 1 | |
| Osmanthus insularis | Accepted | Osmanthus insularis | 1 | |
| Osmunda regalis | Accepted | Osmunda regalis | 2 | |
| Ossaea sanguinea | Synonym | Miconia leasanguinea | 1 | |
| Ostrya carpinifolia | Accepted | Ostrya carpinifolia | 1 | |
| Osyris alba | Accepted | Osyris alba | 2 | |
| Othocallis siberica | Synonym | Scilla siberica | 1 | |
| Oxalis acetosella | Accepted | Oxalis acetosella | 3 | |
| Oxalis articulata | Accepted | Oxalis articulata | 1 | |
| Oxalis corniculata | Accepted | Oxalis corniculata | 1 | |
| Oxalis debilis | Accepted | Oxalis debilis | 1 | |
| Oxalis dillenii | Accepted | Oxalis dillenii | 1 | |
| Oxalis fontana | Synonym | Oxalis stricta | 1 | |
| Oxalis stricta | Accepted | Oxalis stricta | 1 | |
| Oxandra asbeckii | Accepted | Oxandra asbeckii | 1 | |
| Oxycoccus microcarpus | Synonym | Vaccinium microcarpum | 1 | |
| Oxycoccus palustris | Synonym | Vaccinium oxycoccos | 1 | |
| Oxycoccus quadripetalus | Synonym | Vaccinium oxycoccos | 1 | |
| Oxyria digyna | Accepted | Oxyria digyna | 1 | |
| Oxytropis amethystea | Accepted | Oxytropis amethystea | 1 | |
| Oxytropis arctobia | Synonym | Oxytropis nigrescens var. uniflora | 1 | |
| Oxytropis borealis | Accepted | Oxytropis borealis | 1 | |
| Oxytropis bryophila | Accepted | Oxytropis bryophila | 1 | |
| Oxytropis campestris | Accepted | Oxytropis campestris | 1 | |
| Oxytropis campestris | Accepted | Oxytropis campestris | 1 | |
| Oxytropis campestris subsp. sordida | Synonym | Oxytropis sordida | 2 | |
| Oxytropis campestris subsp. tyroliensis | Accepted | Oxytropis campestris subsp. tyroliensis | 1 | |
| Oxytropis carinthiaca | Synonym | Oxytropis lapponica | 1 | |
| Oxytropis carpatica | Accepted | Oxytropis carpatica | 1 | |
| Oxytropis fetida | Accepted | Oxytropis fetida | 1 | |
| Oxytropis halleri | Accepted | Oxytropis halleri | 1 | |
| Oxytropis halleri subsp. velutina | Accepted | Oxytropis halleri subsp. velutina | 1 | |
| Oxytropis helvetica | Accepted | Oxytropis helvetica | 1 | |
| Oxytropis huddelsonii | Accepted | Oxytropis huddelsonii | 1 | |
| Oxytropis jacquinii | Synonym | Oxytropis montana | 1 | |
| Oxytropis lapponica | Accepted | Oxytropis lapponica | 2 | |
| Oxytropis maydelliana | Accepted | Oxytropis maydelliana | 1 | |
| Oxytropis neglecta | Accepted | Oxytropis neglecta | 1 | |
| Oxytropis pilosa | Accepted | Oxytropis pilosa | 1 | |
| Pachira dolichocalyx | Accepted | Pachira dolichocalyx | 1 | |
| Pachypleurum alpinum | Synonym | Neogaya simplex | 1 | |
| Packera heterophylla | Accepted | Packera heterophylla | 1 | |
| Paederota bonarota | Synonym | Veronica bonarota | 1 | |
| Paederota lutea | Synonym | Veronica lutea | 1 | |
| Paeonia officinalis subsp. banatica | Accepted | Paeonia officinalis subsp. banatica | 1 | |
| Paeonia officinalis subsp. huthii | Accepted | Paeonia officinalis subsp. huthii | 1 | |
| Paeonia officinalis subsp. officinalis | Unchecked | 2 | ||
| Palaquium amboinense | Accepted | Palaquium amboinense | 1 | |
| Palaquium formosanum | Accepted | Palaquium formosanum | 1 | |
| Palaquium ridleyi | Accepted | Palaquium ridleyi | 1 | |
| Palicourea guianensis | Accepted | Palicourea guianensis | 1 | |
| Paliurus spina-christi | Accepted | Paliurus spina-christi | 1 | |
| Pallenis spinosa | Accepted | Pallenis spinosa | 1 | |
| Pandanus | Accepted | Pandanus | 1 | |
| Panda oleosa | Accepted | Panda oleosa | 1 | |
| Panicum capillare | Accepted | Panicum capillare | 1 | |
| Panicum dichotomiflorum | Accepted | Panicum dichotomiflorum | 1 | |
| Panicum juniperinum | Synonym | Panicum lycopodioides | 1 | |
| Panicum miliaceum | Accepted | Panicum miliaceum | 1 | |
| Papaver alboroseum | Accepted | Papaver alboroseum | 1 | |
| Papaver alpinum | Synonym | Oreomecon alpina | 1 | |
| Papaver argemone | Synonym | Roemeria argemone | 1 | |
| Papaver aurantiacum | Synonym | Oreomecon alpina | 3 | |
| Papaver corona-sancti-stephani | Synonym | Oreomecon alpina | 1 | |
| Papaver croceum | Synonym | Oreomecon crocea | 1 | |
| Papaver dubium | Accepted | Papaver dubium | 1 | |
| Papaver dubium subsp. dubium | Unchecked | 1 | ||
| Papaver dubium subsp. lecoqii | Accepted | Papaver dubium subsp. lecoqii | 2 | |
| Papaver ernesti-mayeri | Synonym | Oreomecon alpina | 1 | |
| Papaver hultenii | Synonym | Papaver lapponicum | 1 | |
| Papaver hultenii var. salmonicolor | Synonym | Papaver lapponicum | 1 | |
| Papaver hybridum | Synonym | Roemeria hispida | 1 | |
| Papaver kerneri | Synonym | Oreomecon alpina | 1 | |
| Papaver lapponicum | Accepted | Papaver lapponicum | 2 | |
| Papaver lapponicum subsp. occidentale | Unchecked | 1 | ||
| Papaver macounii | Accepted | Papaver macounii | 1 | |
| Papaver mcconellii | Accepted | Papaver mcconellii | 1 | |
| Papaver nudicaule | Synonym | Oreomecon nudicaulis | 2 | |
| Papaver occidentale | Synonym | Oreomecon alpina | 1 | |
| Papaver orientale | Accepted | Papaver orientale | 1 | |
| Papaver pseudo-orientale | Synonym | Papaver setiferum | 1 | |
| Papaver radicatum | Synonym | Oreomecon radicata | 4 | |
| Papaver radicatum subsp. dahlianum | Unchecked | 1 | ||
| Papaver radicatum subsp. laestadianum | Synonym | Papaver laestadianum | 1 | |
| Papaver rhoeas | Accepted | Papaver rhoeas | 2 | |
| Papaver sendtneri | Synonym | Oreomecon alpina | 1 | |
| Papaver somniferum | Accepted | Papaver somniferum | 1 | |
| Papaver tatricum | Synonym | Oreomecon alpina | 1 | |
| Papaver walpolei | Accepted | Papaver walpolei | 1 | |
| Paracryphia alticola | Accepted | Paracryphia alticola | 1 | |
| Paradisea liliastrum | Accepted | Paradisea liliastrum | 1 | |
| Parentucellia latifolia | Accepted | Parentucellia latifolia | 1 | |
| Parietaria judaica | Accepted | Parietaria judaica | 1 | |
| Parietaria lusitanica | Accepted | Parietaria lusitanica | 1 | |
| Parietaria officinalis | Accepted | Parietaria officinalis | 1 | |
| Parinari anamensis | Accepted | Parinari anamensis | 1 | |
| Parinari canarioides | Accepted | Parinari canarioides | 1 | |
| Parinari montana | Accepted | Parinari montana | 1 | |
| Paris quadrifolia | Accepted | Paris quadrifolia | 3 | |
| Parkia velutina | Accepted | Parkia velutina | 1 | |
| Parnassia kotzebuei | Accepted | Parnassia kotzebuei | 1 | |
| Parnassia palustris | Accepted | Parnassia palustris | 2 | |
| Paronychia argentea | Accepted | Paronychia argentea | 1 | |
| Paronychia cymosa | Synonym | Chaetonychia cymosa | 1 | |
| Paronychia kapela | Accepted | Paronychia kapela | 1 | |
| Paronychia kapela subsp. galloprovincialis | Accepted | Paronychia kapela subsp. galloprovincialis | 1 | |
| Paronychia kapela subsp. serpyllifolia | Accepted | Paronychia kapela subsp. serpyllifolia | 1 | |
| Paronychia polygonifolia | Accepted | Paronychia polygonifolia | 1 | |
| Parrya arctica | Accepted | Parrya arctica | 1 | |
| Parrya nudicaulis | Accepted | Parrya nudicaulis | 1 | |
| Parthenocissus inserta | Synonym | Parthenocissus quinquefolia | 1 | |
| Parthenocissus quinquefolia | Accepted | Parthenocissus quinquefolia | 1 | |
| Parthenocissus tricuspidata | Accepted | Parthenocissus tricuspidata | 1 | |
| Paspalum dilatatum | Accepted | Paspalum dilatatum | 1 | |
| Paspalum distichum | Accepted | Paspalum distichum | 1 | |
| Paspalum paniculatum | Accepted | Paspalum paniculatum | 1 | |
| Paspalum scrobiculatum | Accepted | Paspalum scrobiculatum | 1 | |
| Passiflora gabrielliana | Accepted | Passiflora gabrielliana | 1 | |
| Pastinaca sativa | Accepted | Pastinaca sativa | 1 | |
| Pastinaca sativa subsp. sativa | Unchecked | 1 | ||
| Pastinaca sativa subsp. sylvestris | Synonym | Pastinaca sativa | 1 | |
| Pastinaca sativa subsp. urens | Unchecked | 1 | ||
| Paulownia tomentosa | Accepted | Paulownia tomentosa | 1 | |
| Payena ferruginea | Accepted | Payena ferruginea | 1 | |
| Pedicularis ascendens | Accepted | Pedicularis ascendens | 1 | |
| Pedicularis aspleniifolia | Synonym | Pedicularis oederi | 1 | |
| Pedicularis capitata | Accepted | Pedicularis capitata | 1 | |
| Pedicularis cenisia | Accepted | Pedicularis cenisia | 1 | |
| Pedicularis comosa | Accepted | Pedicularis comosa | 1 | |
| Pedicularis elongata | Accepted | Pedicularis elongata | 1 | |
| Pedicularis flammea | Accepted | Pedicularis flammea | 1 | |
| Pedicularis foliosa | Accepted | Pedicularis foliosa | 1 | |
| Pedicularis gyroflexa | Accepted | Pedicularis gyroflexa | 1 | |
| Pedicularis hacquetii | Accepted | Pedicularis hacquetii | 1 | |
| Pedicularis hirsuta | Accepted | Pedicularis hirsuta | 1 | |
| Pedicularis hoermanniana | Accepted | Pedicularis hoermanniana | 1 | |
| Pedicularis julica | Accepted | Pedicularis julica | 1 | |
| Pedicularis kerneri | Accepted | Pedicularis kerneri | 1 | |
| Pedicularis labradorica | Accepted | Pedicularis labradorica | 1 | |
| Pedicularis lanata | Accepted | Pedicularis lanata | 2 | |
| Pedicularis langsdorffii subsp. arctica | Synonym | Pedicularis langsdorffii | 1 | |
| Pedicularis lapponica | Accepted | Pedicularis lapponica | 1 | |
| Pedicularis oederi | Accepted | Pedicularis oederi | 2 | |
| Pedicularis palustris | Accepted | Pedicularis palustris | 3 | |
| Pedicularis portenschlagii | Accepted | Pedicularis portenschlagii | 1 | |
| Pedicularis recutita | Accepted | Pedicularis recutita | 1 | |
| Pedicularis rosea | Accepted | Pedicularis rosea | 1 | |
| Pedicularis rosea subsp. allionii | Accepted | Pedicularis rosea subsp. allionii | 1 | |
| Pedicularis rostratocapitata | Accepted | Pedicularis rostratocapitata | 1 | |
| Pedicularis rostratospicata | Accepted | Pedicularis rostratospicata | 1 | |
| Pedicularis rostratospicata subsp. helvetica | Accepted | Pedicularis rostratospicata subsp. helvetica | 1 | |
| Pedicularis sceptrum-carolinum | Accepted | Pedicularis sceptrum-carolinum | 3 | |
| Pedicularis sylvatica | Accepted | Pedicularis sylvatica | 2 | |
| Pedicularis tuberosa | Accepted | Pedicularis tuberosa | 1 | |
| Pedicularis verticillata | Accepted | Pedicularis verticillata | 2 | |
| Peltaria alliacea | Accepted | Peltaria alliacea | 1 | |
| Peltogyne venosa | Accepted | Peltogyne venosa | 1 | |
| Pentadiplandra brazzeana | Accepted | Pentadiplandra brazzeana | 1 | |
| Persea willdenovii | Accepted | Persea willdenovii | 1 | |
| Persicaria amphibia | Accepted | Persicaria amphibia | 1 | |
| Persicaria lapathifolia | Accepted | Persicaria lapathifolia | 1 | |
| Persicaria lapathifolia | Accepted | Persicaria lapathifolia | 1 | |
| Petasites albus | Accepted | Petasites albus | 2 | |
| Petasites frigidus | Accepted | Petasites frigidus | 1 | |
| Petasites hybridus | Accepted | Petasites hybridus | 2 | |
| Petasites kablikianus | Accepted | Petasites kablikianus | 1 | |
| Petasites paradoxus | Accepted | Petasites paradoxus | 1 | |
| Petasites pyrenaicus | Accepted | Petasites pyrenaicus | 1 | |
| Petrocallis pyrenaica | Accepted | Petrocallis pyrenaica | 1 | |
| Petrocoptis crassifolia | Synonym | Silene montserratii subsp. crassifolia | 1 | |
| Petrocoptis pyrenaica | Synonym | Silene glaucifolia | 1 | |
| Petrorhagia prolifera | Accepted | Petrorhagia prolifera | 1 | |
| Petrorhagia saxifraga | Accepted | Petrorhagia saxifraga | 1 | |
| Petroselinum crispum | Accepted | Petroselinum crispum | 1 | |
| Peucedanum alsaticum | Accepted | Peucedanum alsaticum | 1 | |
| Peucedanum austriacum subsp. austriacum | Unchecked | 1 | ||
| Peucedanum carvifolia | Synonym | Dichoropetalum carvifolia | 1 | |
| Peucedanum cervaria | Accepted | Peucedanum cervaria | 1 | |
| Peucedanum longifolium | Accepted | Peucedanum longifolium | 1 | |
| Peucedanum officinale | Accepted | Peucedanum officinale | 1 | |
| Peucedanum oreoselinum | Accepted | Peucedanum oreoselinum | 1 | |
| Peucedanum ostruthium | Accepted | Peucedanum ostruthium | 2 | |
| Peucedanum palustre | Accepted | Peucedanum palustre | 1 | |
| Peucedanum palustre | Accepted | Peucedanum palustre | 1 | |
| Peucedanum rablense | Accepted | Peucedanum rablense | 1 | |
| Peucedanum venetum | Accepted | Peucedanum venetum | 1 | |
| Peucedanum verticillare | Accepted | Peucedanum verticillare | 1 | |
| Phacelia tanacetifolia | Accepted | Phacelia tanacetifolia | 2 | |
| Phagnalon rupestre | Accepted | Phagnalon rupestre | 1 | |
| Phagnalon rupestre subsp. annoticum | Synonym | Phagnalon rupestre subsp. illyricum | 1 | |
| Phagnalon saxatile | Accepted | Phagnalon saxatile | 1 | |
| Phagnalon sordidum | Accepted | Phagnalon sordidum | 1 | |
| Phalacrocarpum oppositifolium | Accepted | Phalacrocarpum oppositifolium | 1 | |
| Phalaris arundinacea | Accepted | Phalaris arundinacea | 2 | |
| Phalaris arundinacea var. picta | Synonym | Phalaris arundinacea | 1 | |
| Phalaris canariensis | Accepted | Phalaris canariensis | 2 | |
| Phalaroides arundinacea | Synonym | Phalaris arundinacea | 1 | |
| Phegopteris connectilis | Accepted | Phegopteris connectilis | 2 | |
| Phelline brachyphylla | Accepted | Phelline brachyphylla | 1 | |
| Philadelphus coronarius | Accepted | Philadelphus coronarius | 1 | |
| Phillyrea angustifolia | Accepted | Phillyrea angustifolia | 3 | |
| Phillyrea latifolia | Accepted | Phillyrea latifolia | 1 | |
| Phippsia concinna | Accepted | Phippsia concinna | 1 | |
| Phleum alpinum | Accepted | Phleum alpinum | 2 | |
| Phleum arenarium | Accepted | Phleum arenarium | 1 | |
| Phleum bertolonii | Accepted | Phleum bertolonii | 1 | |
| Phleum hirsutum | Accepted | Phleum hirsutum | 1 | |
| Phleum paniculatum | Accepted | Phleum paniculatum | 1 | |
| Phleum phleoides | Accepted | Phleum phleoides | 2 | |
| Phleum pratense | Accepted | Phleum pratense | 2 | |
| Phleum rhaeticum | Synonym | Phleum alpinum | 1 | |
| Phlomis herba-venti | Accepted | Phlomis herba-venti | 1 | |
| Phlomis lychnitis | Accepted | Phlomis lychnitis | 2 | |
| Phlox hoodii | Accepted | Phlox hoodii | 1 | |
| Phragmites australis | Accepted | Phragmites australis | 2 | |
| Phyllodoce caerulea | Accepted | Phyllodoce caerulea | 1 | |
| Phyllonoma laticuspis | Accepted | Phyllonoma laticuspis | 1 | |
| Physalis alkekengi | Synonym | Alkekengi officinarum | 1 | |
| Physalis peruviana | Accepted | Physalis peruviana | 1 | |
| Physaria arctica | Unchecked | 1 | ||
| Physocarpus opulifolius | Accepted | Physocarpus opulifolius | 1 | |
| Physoplexis comosa | Accepted | Physoplexis comosa | 1 | |
| Phyteuma betonicifolium | Accepted | Phyteuma betonicifolium | 1 | |
| Phyteuma charmelii | Accepted | Phyteuma charmelii | 1 | |
| Phyteuma confusum | Accepted | Phyteuma confusum | 1 | |
| Phyteuma cordatum | Accepted | Phyteuma cordatum | 2 | |
| Phyteuma gallicum | Accepted | Phyteuma gallicum | 1 | |
| Phyteuma globulariifolium subsp. globulariifolium | Unchecked | 1 | ||
| Phyteuma globulariifolium subsp. pedemontanum | Synonym | Phyteuma globulariifolium | 1 | |
| Phyteuma hedraianthifolium | Accepted | Phyteuma hedraianthifolium | 1 | |
| Phyteuma hemisphaericum | Accepted | Phyteuma hemisphaericum | 1 | |
| Phyteuma humile | Accepted | Phyteuma humile | 1 | |
| Phyteuma michelii | Accepted | Phyteuma michelii | 2 | |
| Phyteuma nigrum | Accepted | Phyteuma nigrum | 1 | |
| Phyteuma orbiculare | Accepted | Phyteuma orbiculare | 3 | |
| Phyteuma orbiculare | Accepted | Phyteuma orbiculare | 1 | |
| Phyteuma orbiculare | Accepted | Phyteuma orbiculare | 1 | |
| Phyteuma ovatum | Accepted | Phyteuma ovatum | 1 | |
| Phyteuma persicifolium | Accepted | Phyteuma persicifolium | 1 | |
| Phyteuma pyrenaicum | Synonym | Phyteuma spicatum | 1 | |
| Phyteuma scheuchzeri | Accepted | Phyteuma scheuchzeri | 1 | |
| Phyteuma scheuchzeri subsp. columnae | Accepted | Phyteuma scheuchzeri subsp. columnae | 1 | |
| Phyteuma scorzonerifolium | Accepted | Phyteuma scorzonerifolium | 1 | |
| Phyteuma serratum | Accepted | Phyteuma serratum | 1 | |
| Phyteuma sieberi | Accepted | Phyteuma sieberi | 1 | |
| Phyteuma spicatum | Accepted | Phyteuma spicatum | 2 | |
| Phyteuma spicatum subsp. coeruleum | Synonym | Phyteuma spicatum | 1 | |
| Phyteuma tetramerum | Accepted | Phyteuma tetramerum | 1 | |
| Phyteuma vagneri | Accepted | Phyteuma vagneri | 1 | |
| Phyteuma villarsii | Synonym | Phyteuma charmelii | 2 | |
| Phytolacca americana | Accepted | Phytolacca americana | 1 | |
| Phytolacca esculenta | Accepted | Phytolacca esculenta | 1 | |
| Picea abies | Accepted | Picea abies | 2 | |
| Picea abies subsp. obovata | Synonym | Picea obovata | 1 | |
| Picea sitchensis | Accepted | Picea sitchensis | 1 | |
| Picnomon acarna | Accepted | Picnomon acarna | 1 | |
| Picramnia gardneri | Accepted | Picramnia gardneri | 1 | |
| Picramnia latifolia | Accepted | Picramnia latifolia | 1 | |
| Picris echioides | Synonym | Helminthotheca echioides | 1 | |
| Picris hieracioides subsp. hieracioides | Synonym | Picris hieracioides | 1 | |
| Picris hieracioides subsp. spinulosa | Accepted | Picris hieracioides subsp. spinulosa | 1 | |
| Picris hieracioides subsp. villarsii | Accepted | Picris hieracioides subsp. villarsii | 1 | |
| Picris pauciflora | Accepted | Picris pauciflora | 1 | |
| Pilocarpus pauciflorus | Accepted | Pilocarpus pauciflorus | 1 | |
| Pilocarpus pennatifolius | Accepted | Pilocarpus pennatifolius | 1 | |
| Pilosella alpicola | Accepted | Pilosella alpicola | 1 | |
| Pilosella hyperborea | Accepted | Pilosella hyperborea | 2 | |
| Pilosella peleteriana | Accepted | Pilosella peleteriana | 2 | |
| Pilosella ullepitschii | Accepted | Pilosella ullepitschii | 1 | |
| Pilostyles haussknechtii | Accepted | Pilostyles haussknechtii | 1 | |
| Pilularia globulifera | Accepted | Pilularia globulifera | 1 | |
| Pimenta pseudocaryophyllus | Accepted | Pimenta pseudocaryophyllus | 1 | |
| Pimpinella alpina | Unchecked | 1 | ||
| Pimpinella major | Accepted | Pimpinella major | 2 | |
| Pimpinella nigra | Synonym | Pimpinella saxifraga subsp. nigra | 1 | |
| Pimpinella peregrina | Accepted | Pimpinella peregrina | 1 | |
| Pimpinella saxifraga | Accepted | Pimpinella saxifraga | 2 | |
| Pimpinella tragium | Accepted | Pimpinella tragium | 1 | |
| Pinguicula alpina | Accepted | Pinguicula alpina | 3 | |
| Pinguicula arvetii | Synonym | Pinguicula leptoceras | 1 | |
| Pinguicula grandiflora subsp. rosea | Accepted | Pinguicula grandiflora subsp. rosea | 1 | |
| Pinguicula hirtiflora | Accepted | Pinguicula hirtiflora | 1 | |
| Pinguicula leptoceras | Accepted | Pinguicula leptoceras | 1 | |
| Pinguicula poldinii | Accepted | Pinguicula poldinii | 1 | |
| Pinguicula reichenbachiana | Accepted | Pinguicula reichenbachiana | 1 | |
| Pinguicula vulgaris | Accepted | Pinguicula vulgaris | 2 | |
| Pinus cembra | Accepted | Pinus cembra | 2 | |
| Pinus halepensis | Accepted | Pinus halepensis | 1 | |
| Pinus mugo | Accepted | Pinus mugo | 1 | |
| Pinus mugo subsp. mugo | Unchecked | 1 | ||
| Pinus mugo subsp. uncinata | Synonym | Pinus uncinata | 1 | |
| Pinus nigra | Accepted | Pinus nigra | 1 | |
| Pinus sylvestris | Accepted | Pinus sylvestris | 2 | |
| Pinus sylvestris subsp. engadinensis | Synonym | Pinus × rhaetica | 1 | |
| Pinus sylvestris subsp. lapponica | Synonym | Pinus sylvestris | 1 | |
| Piper cernuum | Accepted | Piper cernuum | 1 | |
| Piptatherum coerulescens | Accepted | Piptatherum coerulescens | 1 | |
| Piptatherum miliaceum | Accepted | Piptatherum miliaceum | 1 | |
| Piptatherum paradoxum | Accepted | Piptatherum paradoxum | 1 | |
| Piptatherum virescens | Accepted | Piptatherum virescens | 1 | |
| Pistacia lentiscus | Accepted | Pistacia lentiscus | 1 | |
| Pistacia terebinthus | Accepted | Pistacia terebinthus | 1 | |
| Pisum sativum | Synonym | Lathyrus oleraceus | 1 | |
| Pisum sativum subsp. arvense | Synonym | Lathyrus oleraceus | 1 | |
| Pisum sativum subsp. biflorum | Synonym | Lathyrus oleraceus | 1 | |
| Pitcairnia rubiginosa | Accepted | Pitcairnia rubiginosa | 1 | |
| Plantago afra | Accepted | Plantago afra | 1 | |
| Plantago alpina | Accepted | Plantago alpina | 1 | |
| Plantago altissima | Accepted | Plantago altissima | 1 | |
| Plantago arenaria | Synonym | Plantago indica | 1 | |
| Plantago argentea | Accepted | Plantago argentea | 1 | |
| Plantago atrata | Accepted | Plantago atrata | 1 | |
| Plantago atrata subsp. carpatica | Unchecked | 1 | ||
| Plantago canescens subsp. richardsonii | Unchecked | 1 | ||
| Plantago coronopus | Accepted | Plantago coronopus | 1 | |
| Plantago gentianoides | Accepted | Plantago gentianoides | 1 | |
| Plantago holosteum | Synonym | Plantago subulata | 1 | |
| Plantago lagopus | Accepted | Plantago lagopus | 1 | |
| Plantago lanceolata | Accepted | Plantago lanceolata | 2 | |
| Plantago major | Accepted | Plantago major | 1 | |
| Plantago major subsp. intermedia | Accepted | Plantago major subsp. intermedia | 1 | |
| Plantago major subsp. major | Unchecked | 1 | ||
| Plantago maritima | Accepted | Plantago maritima | 1 | |
| Plantago maritima subsp. borealis | Synonym | Plantago maritima | 1 | |
| Plantago maritima subsp. maritima | Synonym | Plantago maritima | 1 | |
| Plantago maritima subsp. serpentina | Synonym | Plantago maritima | 1 | |
| Plantago media | Accepted | Plantago media | 1 | |
| Plantago sempervirens | Accepted | Plantago sempervirens | 1 | |
| Platanthera bifolia | Accepted | Platanthera bifolia | 2 | |
| Platanthera chlorantha | Accepted | Platanthera chlorantha | 1 | |
| Platanthera dilatata | Accepted | Platanthera dilatata | 1 | |
| Platanthera hyperborea | Accepted | Platanthera hyperborea | 1 | |
| Platanthera oligantha | Accepted | Platanthera oligantha | 1 | |
| Platanus occidentalis | Accepted | Platanus occidentalis | 1 | |
| Platymiscium pinnatum | Accepted | Platymiscium pinnatum | 1 | |
| Pleuropogon sabinei | Accepted | Pleuropogon sabinei | 1 | |
| Pleurospermum austriacum | Accepted | Pleurospermum austriacum | 1 | |
| Plinia complanata | Accepted | Plinia complanata | 1 | |
| Plinia pseudodichasiantha | Accepted | Plinia pseudodichasiantha | 1 | |
| Plinia rivularis | Accepted | Plinia rivularis | 1 | |
| Plinia trunciflora | Accepted | Plinia trunciflora | 1 | |
| Plocosperma buxifolium | Accepted | Plocosperma buxifolium | 1 | |
| Poa abbreviata | Accepted | Poa abbreviata | 1 | |
| Poa alpina | Accepted | Poa alpina | 2 | |
| Poa alpina subsp. alpina | Synonym | Poa alpina | 1 | |
| Poa alpina var. vivipara | Synonym | Poa alpina | 1 | |
| Poa angustifolia | Accepted | Poa angustifolia | 1 | |
| Poa annua | Accepted | Poa annua | 2 | |
| Poa arctica | Accepted | Poa arctica | 2 | |
| Poa badensis | Accepted | Poa badensis | 1 | |
| Poa bulbosa | Accepted | Poa bulbosa | 2 | |
| Poa cenisia | Accepted | Poa cenisia | 2 | |
| Poa chaixii | Accepted | Poa chaixii | 2 | |
| Poa compressa | Accepted | Poa compressa | 1 | |
| Poa flaccidula | Accepted | Poa flaccidula | 1 | |
| Poa glauca | Accepted | Poa glauca | 2 | |
| Poa granitica subsp. disparilis | Accepted | Poa granitica subsp. disparilis | 1 | |
| Poa hartzii | Accepted | Poa hartzii | 1 | |
| Poa hybrida | Accepted | Poa hybrida | 1 | |
| Poa laxa | Accepted | Poa laxa | 1 | |
| Poa laxa subsp. flexuosa | Synonym | Poa flexuosa | 2 | |
| Poa leptocoma | Accepted | Poa leptocoma | 1 | |
| Poa minor | Accepted | Poa minor | 1 | |
| Poa molinerii | Accepted | Poa molinerii | 2 | |
| Poa nemoralis | Accepted | Poa nemoralis | 2 | |
| Poa nemoralis subsp. carpatica | Synonym | Poa carpatica | 1 | |
| Poa palustris | Accepted | Poa palustris | 2 | |
| Poa perconcinna | Accepted | Poa perconcinna | 1 | |
| Poa pratensis | Accepted | Poa pratensis | 2 | |
| Poa pratensis subsp. alpigena | Synonym | Poa alpigena | 1 | |
| Poa pratensis subsp. angustifolia | Synonym | Poa angustifolia | 1 | |
| Poa pratensis subsp. colpodea | Synonym | Poa alpigena | 1 | |
| Poa pratensis subsp. irrigata | Synonym | Poa humilis | 1 | |
| Poa pratensis subsp. pratensis | Synonym | Poa pratensis | 2 | |
| Poa pratensis subsp. subcaerulea | Synonym | Poa humilis | 2 | |
| Poa remota | Accepted | Poa remota | 1 | |
| Poa stiriaca | Accepted | Poa stiriaca | 1 | |
| Poa supina | Accepted | Poa supina | 1 | |
| Poa trivialis | Accepted | Poa trivialis | 1 | |
| Poa trivialis subsp. sylvicola | Synonym | Poa trivialis | 1 | |
| Poa trivialis subsp. trivialis | Synonym | Poa trivialis | 1 | |
| Poa ursina | Accepted | Poa ursina | 1 | |
| Poa variegata | Accepted | Poa variegata | 1 | |
| Podistera macounii | Accepted | Podistera macounii | 1 | |
| Poecilanthe effusa | Synonym | Amphiodon effusus | 1 | |
| Pogonophora schomburgkiana | Accepted | Pogonophora schomburgkiana | 1 | |
| Polemonium acutiflorum | Accepted | Polemonium acutiflorum | 1 | |
| Polemonium boreale | Accepted | Polemonium boreale | 1 | |
| Polemonium caeruleum | Accepted | Polemonium caeruleum | 3 | |
| Polemonium pulcherrimum | Accepted | Polemonium pulcherrimum | 1 | |
| Polemonium villosissimum | Accepted | Polemonium villosissimum | 1 | |
| Polycarpon tetraphyllum | Accepted | Polycarpon tetraphyllum | 1 | |
| Polycnemum majus | Accepted | Polycnemum majus | 1 | |
| Polygala alpestris | Accepted | Polygala alpestris | 1 | |
| Polygala alpina | Accepted | Polygala alpina | 2 | |
| Polygala amara | Accepted | Polygala amara | 1 | |
| Polygala amarella | Accepted | Polygala amarella | 2 | |
| Polygala calcarea | Accepted | Polygala calcarea | 1 | |
| Polygala chamaebuxus | Synonym | Polygaloides chamaebuxus | 1 | |
| Polygala comosa | Accepted | Polygala comosa | 1 | |
| Polygala exilis | Accepted | Polygala exilis | 1 | |
| Polygala major | Accepted | Polygala major | 1 | |
| Polygala monspeliaca | Accepted | Polygala monspeliaca | 1 | |
| Polygala nicaeensis | Accepted | Polygala nicaeensis | 1 | |
| Polygala nicaeensis subsp. carniolica | Accepted | Polygala nicaeensis subsp. carniolica | 1 | |
| Polygala nicaeensis subsp. gariodiana | Accepted | Polygala nicaeensis subsp. gariodiana | 1 | |
| Polygala serpyllifolia | Accepted | Polygala serpyllifolia | 1 | |
| Polygala vulgaris | Accepted | Polygala vulgaris | 1 | |
| Polygala vulgaris subsp. oxyptera | Synonym | Polygala vulgaris | 1 | |
| Polygala vulgaris subsp. vulgaris | Unchecked | 1 | ||
| Polygonatum latifolium | Accepted | Polygonatum latifolium | 1 | |
| Polygonatum multiflorum | Accepted | Polygonatum multiflorum | 1 | |
| Polygonatum odoratum | Accepted | Polygonatum odoratum | 1 | |
| Polygonatum verticillatum | Accepted | Polygonatum verticillatum | 2 | |
| Polygonum alpinum | Synonym | Persicaria alpina | 2 | |
| Polygonum amphibium | Synonym | Persicaria amphibia | 1 | |
| Polygonum arenastrum | Accepted | Polygonum arenastrum | 1 | |
| Polygonum aviculare | Accepted | Polygonum aviculare | 2 | |
| Polygonum aviculare subsp. boreale | Synonym | Polygonum boreale | 1 | |
| Polygonum bellardii | Accepted | Polygonum bellardii | 1 | |
| Polygonum bistorta | Synonym | Persicaria bistorta | 1 | |
| Polygonum bohemicum | Synonym | Reynoutria × bohemica | 1 | |
| Polygonum hydropiper | Synonym | Persicaria hydropiper | 1 | |
| Polygonum lapathifolium | Synonym | Persicaria lapathifolia | 1 | |
| Polygonum minus | Synonym | Persicaria minor | 1 | |
| Polygonum mite | Synonym | Persicaria mitis | 1 | |
| Polygonum orientale | Synonym | Persicaria orientalis | 1 | |
| Polygonum persicaria | Synonym | Persicaria maculosa | 1 | |
| Polygonum polystachyum | Synonym | Persicaria wallichii | 1 | |
| Polygonum raii subsp. norvegicum | Synonym | Polygonum norvegicum | 1 | |
| Polygonum rurivagum | Accepted | Polygonum rurivagum | 1 | |
| Polygonum viviparum | Synonym | Persicaria vivipara | 2 | |
| Polypodium cambricum | Accepted | Polypodium cambricum | 1 | |
| Polypodium interjectum | Accepted | Polypodium interjectum | 1 | |
| Polypodium vulgare | Accepted | Polypodium vulgare | 2 | |
| Polypogon monspeliensis | Accepted | Polypogon monspeliensis | 1 | |
| Polypogon viridis | Accepted | Polypogon viridis | 1 | |
| Polypremum procumbens | Accepted | Polypremum procumbens | 2 | |
| Polystichum aculeatum | Accepted | Polystichum aculeatum | 2 | |
| Polystichum braunii | Accepted | Polystichum braunii | 1 | |
| Polystichum lonchitis | Accepted | Polystichum lonchitis | 2 | |
| Polystichum setiferum | Accepted | Polystichum setiferum | 1 | |
| Pontederia cordata | Accepted | Pontederia cordata | 1 | |
| Populus alba | Accepted | Populus alba | 1 | |
| Populus balsamifera | Accepted | Populus balsamifera | 1 | |
| Populus × canescens | Accepted | Populus × canescens | 1 | |
| Populus nigra subsp. nigra | Unchecked | 1 | ||
| Populus tremula | Accepted | Populus tremula | 2 | |
| Poraqueiba guianensis | Accepted | Poraqueiba guianensis | 1 | |
| Portulaca grandiflora | Accepted | Portulaca grandiflora | 1 | |
| Portulaca oleracea subsp. oleracea | Synonym | Portulaca oleracea | 1 | |
| Posidonia oceanica | Accepted | Posidonia oceanica | 1 | |
| Posoqueria latifolia | Accepted | Posoqueria latifolia | 1 | |
| Potamogeton alpinus | Accepted | Potamogeton alpinus | 2 | |
| Potamogeton berchtoldii | Accepted | Potamogeton berchtoldii | 2 | |
| Potamogeton coloratus | Accepted | Potamogeton coloratus | 1 | |
| Potamogeton crispus | Accepted | Potamogeton crispus | 1 | |
| Potamogeton filiformis | Unchecked | 1 | ||
| Potamogeton friesii | Accepted | Potamogeton friesii | 2 | |
| Potamogeton gramineus | Accepted | Potamogeton gramineus | 2 | |
| Potamogeton helveticus | Synonym | Stuckenia pectinata | 1 | |
| Potamogeton lucens | Accepted | Potamogeton lucens | 1 | |
| Potamogeton natans | Accepted | Potamogeton natans | 2 | |
| Potamogeton nitens | Synonym | Potamogeton lucens | 1 | |
| Potamogeton nodosus | Accepted | Potamogeton nodosus | 1 | |
| Potamogeton obtusifolius | Accepted | Potamogeton obtusifolius | 2 | |
| Potamogeton pectinatus | Synonym | Stuckenia pectinata | 1 | |
| Potamogeton perfoliatus | Accepted | Potamogeton perfoliatus | 2 | |
| Potamogeton polygonifolius | Accepted | Potamogeton polygonifolius | 1 | |
| Potamogeton praelongus | Accepted | Potamogeton praelongus | 2 | |
| Potamogeton pusillus | Accepted | Potamogeton pusillus | 1 | |
| Potentilla alba | Accepted | Potentilla alba | 1 | |
| Potentilla anserina | Accepted | Potentilla anserina | 2 | |
| Potentilla arenosa subsp. chamissonis | Synonym | Potentilla chamissonis | 1 | |
| Potentilla arenosa subsp. chamissonis | Synonym | Potentilla chamissonis | 1 | |
| Potentilla argentea | Accepted | Potentilla argentea | 2 | |
| Potentilla atrosanguinea | Accepted | Potentilla atrosanguinea | 1 | |
| Potentilla aurea | Accepted | Potentilla aurea | 1 | |
| Potentilla aurea subsp. chrysocraspeda | Accepted | Potentilla aurea subsp. chrysocraspeda | 1 | |
| Potentilla australis | Synonym | Potentilla tabernaemontani | 1 | |
| Potentilla biflora | Accepted | Potentilla biflora | 1 | |
| Potentilla brauneana | Accepted | Potentilla brauneana | 1 | |
| Potentilla carniolica | Accepted | Potentilla carniolica | 1 | |
| Potentilla caulescens | Accepted | Potentilla caulescens | 1 | |
| Potentilla chrysantha | Accepted | Potentilla chrysantha | 1 | |
| Potentilla cinerea | Accepted | Potentilla cinerea | 1 | |
| Potentilla clusiana | Accepted | Potentilla clusiana | 1 | |
| Potentilla crantzii | Accepted | Potentilla crantzii | 2 | |
| Potentilla delphinensis | Accepted | Potentilla delphinensis | 1 | |
| Potentilla egedei | Synonym | Argentina anserina subsp. groenlandica | 1 | |
| Potentilla erecta | Accepted | Potentilla erecta | 2 | |
| Potentilla frigida | Accepted | Potentilla frigida | 1 | |
| Potentilla fruticosa | Unchecked | 1 | ||
| Potentilla grammopetala | Accepted | Potentilla grammopetala | 1 | |
| Potentilla grandiflora | Accepted | Potentilla grandiflora | 1 | |
| Potentilla haynaldiana | Accepted | Potentilla haynaldiana | 1 | |
| Potentilla heptaphylla | Accepted | Potentilla heptaphylla | 1 | |
| Potentilla hirta | Accepted | Potentilla hirta | 1 | |
| Potentilla hyparctica | Accepted | Potentilla hyparctica | 1 | |
| Potentilla inclinata | Accepted | Potentilla inclinata | 1 | |
| Potentilla intermedia | Accepted | Potentilla intermedia | 2 | |
| Potentilla lyngei | Synonym | Potentilla sommerfeltii | 1 | |
| Potentilla micrantha | Accepted | Potentilla micrantha | 1 | |
| Potentilla multifida | Accepted | Potentilla multifida | 1 | |
| Potentilla neglecta | Accepted | Potentilla neglecta | 1 | |
| Potentilla neumanniana | Accepted | Potentilla neumanniana | 1 | |
| Potentilla nitida | Accepted | Potentilla nitida | 1 | |
| Potentilla nivalis | Accepted | Potentilla nivalis | 1 | |
| Potentilla nivea | Accepted | Potentilla nivea | 3 | |
| Potentilla norvegica | Accepted | Potentilla norvegica | 2 | |
| Potentilla palustris | Synonym | Comarum palustre | 1 | |
| Potentilla pedata | Accepted | Potentilla pedata | 1 | |
| Potentilla praecox | Accepted | Potentilla praecox | 1 | |
| Potentilla pulchella | Accepted | Potentilla pulchella | 1 | |
| Potentilla pusilla | Accepted | Potentilla pusilla | 1 | |
| Potentilla ranunculus | Unchecked | 1 | ||
| Potentilla recta | Accepted | Potentilla recta | 1 | |
| Potentilla reptans | Accepted | Potentilla reptans | 1 | |
| Potentilla rubricaulis | Accepted | Potentilla rubricaulis | 1 | |
| Potentilla rubricaulis | Accepted | Potentilla rubricaulis | 1 | |
| Potentilla rupestris | Unchecked | 1 | ||
| Potentilla saxifraga | Accepted | Potentilla saxifraga | 1 | |
| Potentilla sterilis | Accepted | Potentilla sterilis | 1 | |
| Potentilla subgorodkovii | Accepted | Potentilla subgorodkovii | 1 | |
| Potentilla subvahliana | Accepted | Potentilla subvahliana | 1 | |
| Potentilla supina | Accepted | Potentilla supina | 1 | |
| Potentilla thuringiaca | Accepted | Potentilla thuringiaca | 2 | |
| Potentilla uniflora | Accepted | Potentilla uniflora | 1 | |
| Potentilla valderia | Accepted | Potentilla valderia | 1 | |
| Potentilla villosa | Accepted | Potentilla villosa | 1 | |
| Poterium sanguisorba | Synonym | Sanguisorba minor | 1 | |
| Pourouma melinonii | Accepted | Pourouma melinonii | 1 | |
| Pouteria altissima | Accepted | Pouteria altissima | 1 | |
| Pouteria ambelaniifolia | Accepted | Pouteria ambelaniifolia | 1 | |
| Pouteria aubrevillei | Accepted | Pouteria aubrevillei | 1 | |
| Pouteria beaurepairei | Accepted | Pouteria beaurepairei | 1 | |
| Pouteria benai | Accepted | Pouteria benai | 1 | |
| Pouteria caimito | Accepted | Pouteria caimito | 1 | |
| Pouteria cladantha | Accepted | Pouteria cladantha | 1 | |
| Pouteria cuspidata | Accepted | Pouteria cuspidata | 1 | |
| Pouteria decorticans | Accepted | Pouteria decorticans | 1 | |
| Pouteria durlandii | Accepted | Pouteria durlandii | 1 | |
| Pouteria egregia | Accepted | Pouteria egregia | 1 | |
| Pouteria eugeniifolia | Accepted | Pouteria eugeniifolia | 1 | |
| Pouteria fimbriata | Accepted | Pouteria fimbriata | 1 | |
| Pouteria flavilatex | Accepted | Pouteria flavilatex | 1 | |
| Pouteria gardneriana | Accepted | Pouteria gardneriana | 1 | |
| Pouteria grandis | Accepted | Pouteria grandis | 1 | |
| Pouteria hispida | Accepted | Pouteria hispida | 1 | |
| Pouteria lucumifolia | Accepted | Pouteria lucumifolia | 1 | |
| Pouteria maxima | Accepted | Pouteria maxima | 1 | |
| Pouteria melanopoda | Accepted | Pouteria melanopoda | 1 | |
| Pouteria nemorosa | Accepted | Pouteria nemorosa | 1 | |
| Pouteria oblanceolata | Accepted | Pouteria oblanceolata | 1 | |
| Pouteria petiolata | Accepted | Pouteria petiolata | 1 | |
| Pouteria pierrei | Accepted | Pouteria pierrei | 1 | |
| Pouteria platyphylla | Accepted | Pouteria platyphylla | 1 | |
| Pouteria procera | Accepted | Pouteria procera | 1 | |
| Pouteria psammophila | Accepted | Pouteria psammophila | 1 | |
| Pouteria pubescens | Accepted | Pouteria pubescens | 1 | |
| Pouteria putamen-ovi | Accepted | Pouteria putamen-ovi | 1 | |
| Pouteria ramiflora | Accepted | Pouteria ramiflora | 1 | |
| Pouteria reticulata | Accepted | Pouteria reticulata | 1 | |
| Pouteria retinervis | Accepted | Pouteria retinervis | 1 | |
| Pouteria rostrata | Accepted | Pouteria rostrata | 1 | |
| Pouteria sessilis | Accepted | Pouteria sessilis | 1 | |
| Pouteria singularis | Accepted | Pouteria singularis | 1 | |
| Pouteria surumuensis | Accepted | Pouteria surumuensis | 1 | |
| Pouteria torta | Accepted | Pouteria torta | 1 | |
| Pouteria venosa | Accepted | Pouteria venosa | 2 | |
| Pradosia lactescens | Accepted | Pradosia lactescens | 1 | |
| Pradosia surinamensis | Accepted | Pradosia surinamensis | 1 | |
| Prenanthes alata | Synonym | Nabalus alatus | 1 | |
| Prenanthes purpurea | Accepted | Prenanthes purpurea | 1 | |
| Primula acaulis | Synonym | Primula vulgaris | 1 | |
| Primula albenensis | Accepted | Primula albenensis | 1 | |
| Primula allionii | Accepted | Primula allionii | 1 | |
| Primula apennina | Accepted | Primula apennina | 1 | |
| Primula auricula | Accepted | Primula auricula | 2 | |
| Primula auricula subsp. serratifolia | Unchecked | 2 | ||
| Primula carniolica | Accepted | Primula carniolica | 4 | |
| Primula clusiana | Accepted | Primula clusiana | 1 | |
| Primula daonensis | Accepted | Primula daonensis | 1 | |
| Primula deorum | Accepted | Primula deorum | 1 | |
| Primula egaliksensis | Accepted | Primula egaliksensis | 1 | |
| Primula elatior | Accepted | Primula elatior | 2 | |
| Primula elatior subsp. elatior | Unchecked | 1 | ||
| Primula elatior subsp. intricata | Accepted | Primula elatior subsp. intricata | 2 | |
| Primula elatior subsp. leucophylla | Accepted | Primula elatior subsp. leucophylla | 1 | |
| Primula farinosa | Accepted | Primula farinosa | 1 | |
| Primula glaucescens | Accepted | Primula glaucescens | 1 | |
| Primula glutinosa | Accepted | Primula glutinosa | 1 | |
| Primula grignensis | Synonym | Primula hirsuta | 1 | |
| Primula halleri | Accepted | Primula halleri | 1 | |
| Primula hirsuta | Accepted | Primula hirsuta | 1 | |
| Primula integrifolia | Accepted | Primula integrifolia | 1 | |
| Primula kitaibeliana | Accepted | Primula kitaibeliana | 2 | |
| Primula latifolia | Accepted | Primula latifolia | 1 | |
| Primula magellanica | Accepted | Primula magellanica | 1 | |
| Primula marginata | Accepted | Primula marginata | 1 | |
| Primula minima | Accepted | Primula minima | 1 | |
| Primula nutans subsp. finmarchica | Synonym | Primula nutans | 1 | |
| Primula palinuri | Accepted | Primula palinuri | 1 | |
| Primula pedemontana | Accepted | Primula pedemontana | 1 | |
| Primula pumila | Synonym | Primula coronata | 1 | |
| Primula recubariensis | Accepted | Primula recubariensis | 1 | |
| Primula scandinavica | Accepted | Primula scandinavica | 1 | |
| Primula spectabilis | Accepted | Primula spectabilis | 1 | |
| Primula stricta | Accepted | Primula stricta | 2 | |
| Primula tyrolensis | Accepted | Primula tyrolensis | 1 | |
| Primula × venusta | Accepted | Primula × venusta | 1 | |
| Primula veris | Accepted | Primula veris | 1 | |
| Primula veris subsp. columnae | Unchecked | 1 | ||
| Primula veris subsp. veris | Unchecked | 1 | ||
| Primula villosa | Accepted | Primula villosa | 1 | |
| Primula vulgaris | Accepted | Primula vulgaris | 1 | |
| Primula wulfeniana | Accepted | Primula wulfeniana | 1 | |
| Pristimera nervosa | Accepted | Pristimera nervosa | 1 | |
| Pritzelago alpina subsp. alpina | Synonym | Hornungia alpina | 1 | |
| Pritzelago alpina subsp. austroalpina | Synonym | Hornungia alpina subsp. austroalpina | 1 | |
| Pritzelago alpina subsp. brevicaulis | Synonym | Hornungia alpina subsp. brevicaulis | 1 | |
| Proboscidea louisianica | Accepted | Proboscidea louisianica | 1 | |
| Protea madiensis | Accepted | Protea madiensis | 1 | |
| Protium decandrum | Accepted | Protium decandrum | 1 | |
| Protium gallicum | Accepted | Protium gallicum | 1 | |
| Protium morii | Accepted | Protium morii | 1 | |
| Protium opacum | Accepted | Protium opacum | 1 | |
| Protium sagotianum | Accepted | Protium sagotianum | 1 | |
| Prunella grandiflora | Accepted | Prunella grandiflora | 1 | |
| Prunella hyssopifolia | Accepted | Prunella hyssopifolia | 1 | |
| Prunella laciniata | Accepted | Prunella laciniata | 1 | |
| Prunella vulgaris | Accepted | Prunella vulgaris | 2 | |
| Prunus avium | Accepted | Prunus avium | 2 | |
| Prunus brigantina | Accepted | Prunus brigantina | 1 | |
| Prunus domestica | Accepted | Prunus domestica | 1 | |
| Prunus fruticosa | Accepted | Prunus fruticosa | 1 | |
| Prunus laurocerasus | Accepted | Prunus laurocerasus | 1 | |
| Prunus mahaleb | Accepted | Prunus mahaleb | 1 | |
| Prunus padus | Accepted | Prunus padus | 1 | |
| Prunus padus subsp. padus | Synonym | Prunus padus | 1 | |
| Prunus padus subsp. petraea | Synonym | Prunus padus subsp. borealis | 1 | |
| Prunus serotina | Accepted | Prunus serotina | 1 | |
| Prunus spinosa | Accepted | Prunus spinosa | 1 | |
| Pseudolasiacis leptolomoides | Synonym | Panicum leptolomoides | 1 | |
| Pseudolysimachion maritimum | Synonym | Veronica longifolia | 1 | |
| Pseudolysimachion orchideum | Synonym | Veronica orchidea | 1 | |
| Pseudolysimachion spicatum | Synonym | Veronica spicata | 1 | |
| Pseudopiptadenia suaveolens | Accepted | Pseudopiptadenia suaveolens | 1 | |
| Pseudorchis albida | Accepted | Pseudorchis albida | 1 | |
| Pseudorchis albida subsp. tricuspis | Accepted | Pseudorchis albida subsp. tricuspis | 1 | |
| Pseudorchis straminea | Accepted | Pseudorchis straminea | 1 | |
| Pseudostellaria europaea | Accepted | Pseudostellaria europaea | 1 | |
| Psidium cattleianum | Accepted | Psidium cattleianum | 1 | |
| Psidium sartorianum | Synonym | Psidium oligospermum | 1 | |
| Psilurus incurvus | Accepted | Psilurus incurvus | 1 | |
| Psychotria ficigemma | Synonym | Psychotria carthagenensis | 1 | |
| Pteridium aquilinum | Accepted | Pteridium aquilinum | 1 | |
| Pteridium aquilinum subsp. latiusculum | Synonym | Pteridium latiusculum subsp. latiusculum | 1 | |
| Pteris cretica | Accepted | Pteris cretica | 1 | |
| Ptychotis saxifraga | Accepted | Ptychotis saxifraga | 1 | |
| Puccinellia | Accepted | Puccinellia | 1 | |
| Puccinellia angustata | Accepted | Puccinellia angustata | 1 | |
| Puccinellia arctica | Accepted | Puccinellia arctica | 1 | |
| Puccinellia capillaris | Synonym | Puccinellia distans | 1 | |
| Puccinellia distans | Accepted | Puccinellia distans | 1 | |
| Puccinellia maritima | Accepted | Puccinellia maritima | 1 | |
| Puccinellia nutkaensis | Accepted | Puccinellia nutkaensis | 1 | |
| Puccinellia phryganodes | Accepted | Puccinellia phryganodes | 2 | |
| Puccinellia svalbardensis | Synonym | Puccinellia tenella | 1 | |
| Puccinellia vaginata | Accepted | Puccinellia vaginata | 1 | |
| Puccinellia vahliana | Accepted | Puccinellia vahliana | 1 | |
| Pucciphippsia × vacillans | Accepted | Pucciphippsia × vacillans | 1 | |
| Pulicaria dysenterica | Accepted | Pulicaria dysenterica | 1 | |
| Pulicaria vulgaris | Accepted | Pulicaria vulgaris | 1 | |
| Pulmonaria australis | Accepted | Pulmonaria australis | 1 | |
| Pulmonaria carnica | Accepted | Pulmonaria carnica | 1 | |
| Pulmonaria collina | Accepted | Pulmonaria collina | 1 | |
| Pulmonaria filarszkyana | Synonym | Pulmonaria filarczkyana | 1 | |
| Pulmonaria longifolia subsp. cevennensis | Unchecked | 1 | ||
| Pulmonaria longifolia subsp. delphinensis | Unchecked | 1 | ||
| Pulmonaria mollis | Accepted | Pulmonaria mollis | 1 | |
| Pulmonaria montana | Accepted | Pulmonaria montana | 1 | |
| Pulmonaria obscura | Accepted | Pulmonaria obscura | 1 | |
| Pulmonaria officinalis | Accepted | Pulmonaria officinalis | 1 | |
| Pulmonaria picta | Synonym | Pulmonaria saccharata | 1 | |
| Pulmonaria rubra | Accepted | Pulmonaria rubra | 1 | |
| Pulsatilla alpina subsp. alpina | Unchecked | 1 | ||
| Pulsatilla alpina subsp. apiifolia | Unchecked | 1 | ||
| Pulsatilla alpina subsp. austriaca | Synonym | Pulsatilla scherfelii | 1 | |
| Pulsatilla alpina subsp. millefoliata | Accepted | Pulsatilla alpina subsp. millefoliata | 1 | |
| Pulsatilla alpina subsp. schneebergensis | Accepted | Pulsatilla alpina subsp. schneebergensis | 1 | |
| Pulsatilla montana | Accepted | Pulsatilla montana | 1 | |
| Pulsatilla rubra | Accepted | Pulsatilla rubra | 1 | |
| Pulsatilla vernalis | Accepted | Pulsatilla vernalis | 1 | |
| Punica granatum | Accepted | Punica granatum | 1 | |
| Puschkinia scilloides | Accepted | Puschkinia scilloides | 1 | |
| Pyracantha coccinea | Accepted | Pyracantha coccinea | 1 | |
| Pyrola asarifolia | Accepted | Pyrola asarifolia | 1 | |
| Pyrola carpatica | Accepted | Pyrola carpatica | 1 | |
| Pyrola chlorantha | Accepted | Pyrola chlorantha | 2 | |
| Pyrola media | Accepted | Pyrola media | 1 | |
| Pyrola minor | Accepted | Pyrola minor | 2 | |
| Pyrola norvegica | Synonym | Pyrola grandiflora subsp. norvegica | 2 | |
| Pyrola rotundifolia | Accepted | Pyrola rotundifolia | 2 | |
| Pyrus boissieriana | Accepted | Pyrus boissieriana | 1 | |
| Pyrus ghahremanii | Unchecked | 1 | ||
| Pyrus glabra | Accepted | Pyrus glabra | 1 | |
| Pyrus pyraster | Accepted | Pyrus pyraster | 1 | |
| Pyrus salicifolia | Accepted | Pyrus salicifolia | 1 | |
| Pyrus spinosa | Accepted | Pyrus spinosa | 1 | |
| Pyrus syriaca | Accepted | Pyrus syriaca | 1 | |
| Qualea cordata | Accepted | Qualea cordata | 1 | |
| Qualea dinizii | Accepted | Qualea dinizii | 1 | |
| Qualea grandiflora | Accepted | Qualea grandiflora | 1 | |
| Qualea rosea | Accepted | Qualea rosea | 2 | |
| Quararibea duckei | Accepted | Quararibea duckei | 1 | |
| Quercus cerris | Accepted | Quercus cerris | 1 | |
| Quercus coccifera | Accepted | Quercus coccifera | 1 | |
| Quercus crenata | Accepted | Quercus crenata | 1 | |
| Quercus frainetto | Accepted | Quercus frainetto | 1 | |
| Quercus ilex | Accepted | Quercus ilex | 1 | |
| Quercus petraea | Accepted | Quercus petraea | 1 | |
| Quercus polycarpa | Unchecked | 1 | ||
| Quercus pubescens | Accepted | Quercus pubescens | 1 | |
| Quercus robur | Accepted | Quercus robur | 1 | |
| Quercus rubra | Accepted | Quercus rubra | 1 | |
| Quiina obovata | Accepted | Quiina obovata | 1 | |
| Radiola linoides | Accepted | Radiola linoides | 1 | |
| Rafflesia arnoldii | Accepted | Rafflesia arnoldii | 1 | |
| Ramonda myconi | Accepted | Ramonda myconi | 1 | |
| Ramonda serbica | Accepted | Ramonda serbica | 1 | |
| Ranunculus aconitifolius | Accepted | Ranunculus aconitifolius | 2 | |
| Ranunculus acris | Accepted | Ranunculus acris | 1 | |
| Ranunculus acris subsp. acris | Unchecked | 1 | ||
| Ranunculus acris subsp. friesianus | Synonym | Ranunculus acris subsp. friesianus | 1 | |
| Ranunculus aduncus | Accepted | Ranunculus aduncus | 1 | |
| Ranunculus alpestris | Accepted | Ranunculus alpestris | 1 | |
| Ranunculus aquatilis | Accepted | Ranunculus aquatilis | 1 | |
| Ranunculus arcticus | Synonym | Ranunculus pedatifidus subsp. affinis | 1 | |
| Ranunculus arvensis | Accepted | Ranunculus arvensis | 1 | |
| Ranunculus auricomus | Accepted | Ranunculus auricomus | 2 | |
| Ranunculus bilobus | Accepted | Ranunculus bilobus | 1 | |
| Ranunculus braun-blanquetii | Accepted | Ranunculus braun-blanquetii | 1 | |
| Ranunculus breyninus | Accepted | Ranunculus breyninus | 1 | |
| Ranunculus bulbosus | Accepted | Ranunculus bulbosus | 1 | |
| Ranunculus bulbosus subsp. aleae | Synonym | Ranunculus bulbosus subsp. aleae | 1 | |
| Ranunculus carinthiacus | Accepted | Ranunculus carinthiacus | 1 | |
| Ranunculus carpaticus | Accepted | Ranunculus carpaticus | 1 | |
| Ranunculus circinatus | Accepted | Ranunculus circinatus | 1 | |
| Ranunculus confervoides | Unchecked | 1 | ||
| Ranunculus crenatus | Accepted | Ranunculus crenatus | 1 | |
| Ranunculus falcatus | Accepted | Ranunculus falcatus | 1 | |
| Ranunculus fallax | Accepted | Ranunculus fallax | 1 | |
| Ranunculus flammula | Accepted | Ranunculus flammula | 2 | |
| Ranunculus fluitans | Accepted | Ranunculus fluitans | 1 | |
| Ranunculus glacialis | Accepted | Ranunculus glacialis | 3 | |
| Ranunculus gramineus | Accepted | Ranunculus gramineus | 1 | |
| Ranunculus grenierianus | Synonym | Ranunculus villarsii | 1 | |
| Ranunculus hederaceus | Accepted | Ranunculus hederaceus | 1 | |
| Ranunculus hybridus | Accepted | Ranunculus hybridus | 1 | |
| Ranunculus hyperboreus | Accepted | Ranunculus hyperboreus | 1 | |
| Ranunculus kuepferi | Accepted | Ranunculus kuepferi | 1 | |
| Ranunculus lanuginosus | Accepted | Ranunculus lanuginosus | 1 | |
| Ranunculus lanuginosus | Accepted | Ranunculus lanuginosus | 1 | |
| Ranunculus lapponicus | Accepted | Ranunculus lapponicus | 1 | |
| Ranunculus lingua | Accepted | Ranunculus lingua | 2 | |
| Ranunculus monspeliacus | Accepted | Ranunculus monspeliacus | 1 | |
| Ranunculus montanus | Accepted | Ranunculus montanus | 1 | |
| Ranunculus muricatus | Accepted | Ranunculus muricatus | 1 | |
| Ranunculus nivalis | Accepted | Ranunculus nivalis | 1 | |
| Ranunculus ophioglossifolius | Accepted | Ranunculus ophioglossifolius | 1 | |
| Ranunculus pallasii | Accepted | Ranunculus pallasii | 1 | |
| Ranunculus parnassifolius | Accepted | Ranunculus parnassifolius | 1 | |
| Ranunculus parviflorus | Accepted | Ranunculus parviflorus | 1 | |
| Ranunculus peltatus | Accepted | Ranunculus peltatus | 1 | |
| Ranunculus peltatus | Accepted | Ranunculus peltatus | 1 | |
| Ranunculus penicillatus var. pseudofluitans | Synonym | Ranunculus pseudofluitans | 1 | |
| Ranunculus platanifolius | Accepted | Ranunculus platanifolius | 2 | |
| Ranunculus polyanthemoides | Unchecked | 1 | ||
| Ranunculus polyanthemophyllus | Synonym | Ranunculus serpens subsp. polyanthemophyllus | 1 | |
| Ranunculus polyanthemos | Accepted | Ranunculus polyanthemos | 2 | |
| Ranunculus pseudomontanus | Accepted | Ranunculus pseudomontanus | 1 | |
| Ranunculus pygmaeus | Accepted | Ranunculus pygmaeus | 2 | |
| Ranunculus repens | Accepted | Ranunculus repens | 2 | |
| Ranunculus reptans | Accepted | Ranunculus reptans | 2 | |
| Ranunculus rionii | Accepted | Ranunculus rionii | 1 | |
| Ranunculus sabinei | Accepted | Ranunculus sabinei | 1 | |
| Ranunculus sardous | Accepted | Ranunculus sardous | 1 | |
| Ranunculus sceleratus | Accepted | Ranunculus sceleratus | 2 | |
| Ranunculus seguieri | Accepted | Ranunculus seguieri | 1 | |
| Ranunculus serpens | Accepted | Ranunculus serpens | 1 | |
| Ranunculus subborealis | Synonym | Ranunculus propinquus subsp. subborealis | 1 | |
| Ranunculus subborealis subsp. pumilus | Unchecked | 1 | ||
| Ranunculus sulphureus | Accepted | Ranunculus sulphureus | 1 | |
| Ranunculus thora | Accepted | Ranunculus thora | 1 | |
| Ranunculus traunfellneri | Synonym | Ranunculus alpestris subsp. traunfellneri | 1 | |
| Ranunculus trichophyllus | Accepted | Ranunculus trichophyllus | 1 | |
| Ranunculus trichophyllus subsp. trichophyllus | Unchecked | 1 | ||
| Ranunculus trichopyllus subsp. eradicatus | Unchecked | 1 | ||
| Ranunculus tuberosus | Accepted | Ranunculus tuberosus | 1 | |
| Ranunculus villarsii | Accepted | Ranunculus villarsii | 1 | |
| Ranunculus wilanderi | Synonym | Ranunculus pedatifidus subsp. affinis | 1 | |
| Rapatea paludosa | Accepted | Rapatea paludosa | 1 | |
| Raphanus raphanistrum subsp. landra | Accepted | Raphanus raphanistrum subsp. landra | 1 | |
| Raphanus raphanistrum subsp. raphanistrum | Synonym | Raphanus raphanistrum | 1 | |
| Raphanus sativus | Synonym | Raphanus raphanistrum subsp. sativus | 2 | |
| Rapistrum rugosum subsp. orientale | Synonym | Rapistrum rugosum | 1 | |
| Rapistrum rugosum subsp. rugosum | Synonym | Rapistrum rugosum | 1 | |
| Recordoxylon speciosum | Accepted | Recordoxylon speciosum | 1 | |
| Reichardia picroides | Accepted | Reichardia picroides | 1 | |
| Renealmia floribunda | Accepted | Renealmia floribunda | 1 | |
| Reseda lutea | Accepted | Reseda lutea | 2 | |
| Reseda luteola | Accepted | Reseda luteola | 1 | |
| Reseda phyteuma | Accepted | Reseda phyteuma | 1 | |
| Reynoutria × bohemica | Accepted | Reynoutria × bohemica | 1 | |
| Reynoutria japonica | Accepted | Reynoutria japonica | 1 | |
| Rhabdodendron amazonicum | Accepted | Rhabdodendron amazonicum | 1 | |
| Rhagadiolus edulis | Accepted | Rhagadiolus edulis | 1 | |
| Rhamnus alaternus | Accepted | Rhamnus alaternus | 1 | |
| Rhamnus alpina | Accepted | Rhamnus alpina | 1 | |
| Rhamnus alpina subsp. fallax | Accepted | Rhamnus alpina subsp. fallax | 1 | |
| Rhamnus cathartica | Accepted | Rhamnus cathartica | 2 | |
| Rhamnus pumila | Accepted | Rhamnus pumila | 1 | |
| Rhamnus saxatilis | Accepted | Rhamnus saxatilis | 1 | |
| Rheedia madruno | Synonym | Garcinia madruno | 1 | |
| Rheum rhabarbarum | Accepted | Rheum rhabarbarum | 1 | |
| Rhinanthus alectorolophus | Accepted | Rhinanthus alectorolophus | 3 | |
| Rhinanthus angustifolius | Synonym | Rhinanthus major | 1 | |
| Rhinanthus antiquus | Accepted | Rhinanthus antiquus | 1 | |
| Rhinanthus burnatii | Accepted | Rhinanthus burnatii | 1 | |
| Rhinanthus facchinii | Synonym | Rhinanthus alectorolophus | 1 | |
| Rhinanthus freynii | Accepted | Rhinanthus freynii | 1 | |
| Rhinanthus glacialis | Accepted | Rhinanthus glacialis | 1 | |
| Rhinanthus minor | Accepted | Rhinanthus minor | 3 | |
| Rhinanthus minor subsp. stenophyllus | Synonym | Rhinanthus minor | 1 | |
| Rhinanthus ovifugus | Accepted | Rhinanthus ovifugus | 1 | |
| Rhinanthus pampaninii | Accepted | Rhinanthus pampaninii | 1 | |
| Rhinanthus pseudoantiquus | Accepted | Rhinanthus pseudoantiquus | 1 | |
| Rhinanthus pumilus | Unchecked | 1 | ||
| Rhinanthus serotinus | Accepted | Rhinanthus serotinus | 1 | |
| Rhinanthus songeonii | Accepted | Rhinanthus songeonii | 1 | |
| Rhizobotrya alpina | Accepted | Rhizobotrya alpina | 1 | |
| Rhodiola integrifolia | Accepted | Rhodiola integrifolia | 1 | |
| Rhodiola quadrifida | Accepted | Rhodiola quadrifida | 1 | |
| Rhodiola rosea | Accepted | Rhodiola rosea | 1 | |
| Rhodiola rosea | Accepted | Rhodiola rosea | 1 | |
| Rhododendron ferrugineum | Accepted | Rhododendron ferrugineum | 1 | |
| Rhododendron hirsutum | Accepted | Rhododendron hirsutum | 1 | |
| Rhododendron lapponicum | Accepted | Rhododendron lapponicum | 1 | |
| Rhododendron luteum | Accepted | Rhododendron luteum | 1 | |
| Rhododendron myrtifolium | Unchecked | 1 | ||
| Rhododendron tomentosum | Accepted | Rhododendron tomentosum | 1 | |
| Rhodothamnus chamaecistus | Accepted | Rhodothamnus chamaecistus | 1 | |
| Rhus typhina | Accepted | Rhus typhina | 1 | |
| Rhynchospora alba | Accepted | Rhynchospora alba | 2 | |
| Rhynchospora fusca | Accepted | Rhynchospora fusca | 2 | |
| Ribes alpinum | Accepted | Ribes alpinum | 1 | |
| Ribes aureum | Accepted | Ribes aureum | 1 | |
| Ribes glandulosum | Accepted | Ribes glandulosum | 1 | |
| Ribes nigrum | Accepted | Ribes nigrum | 2 | |
| Ribes petraeum | Accepted | Ribes petraeum | 1 | |
| Ribes rubrum | Accepted | Ribes rubrum | 1 | |
| Ribes spicatum | Accepted | Ribes spicatum | 4 | |
| Ribes uva-crispa | Accepted | Ribes uva-crispa | 2 | |
| Ripogonum discolor | Accepted | Ripogonum discolor | 1 | |
| Robinia pseudoacacia | Accepted | Robinia pseudoacacia | 2 | |
| Roegneria violacea | Synonym | Elymus trachycaulus | 1 | |
| Romulea bulbocodium | Accepted | Romulea bulbocodium | 1 | |
| Rorippa amphibia | Accepted | Rorippa amphibia | 1 | |
| Rorippa anceps | Unchecked | 1 | ||
| Rorippa austriaca | Accepted | Rorippa austriaca | 2 | |
| Rorippa islandica | Accepted | Rorippa islandica | 2 | |
| Rorippa lippizensis | Accepted | Rorippa lippizensis | 1 | |
| Rorippa palustris | Accepted | Rorippa palustris | 1 | |
| Rorippa palustris | Accepted | Rorippa palustris | 1 | |
| Rorippa stylosa | Synonym | Rorippa pyrenaica | 1 | |
| Rorippa sylvestris | Accepted | Rorippa sylvestris | 2 | |
| Rosa acicularis | Accepted | Rosa acicularis | 1 | |
| Rosa agrestis | Accepted | Rosa agrestis | 1 | |
| Rosa arvensis | Accepted | Rosa arvensis | 1 | |
| Rosa canina | Accepted | Rosa canina | 2 | |
| Rosa chavinii | Synonym | Rosa chavini | 1 | |
| Rosa corymbifera | Accepted | Rosa corymbifera | 1 | |
| Rosa coziae | Accepted | Rosa coziae | 1 | |
| Rosa dumalis | Unchecked | 2 | ||
| Rosa elliptica | Unchecked | 1 | ||
| Rosa gallica | Accepted | Rosa gallica | 1 | |
| Rosa glauca | Accepted | Rosa glauca | 2 | |
| Rosa majalis | Accepted | Rosa majalis | 2 | |
| Rosa micrantha | Accepted | Rosa micrantha | 1 | |
| Rosa mollis | Accepted | Rosa mollis | 3 | |
| Rosa montana | Accepted | Rosa montana | 1 | |
| Rosa multiflora | Accepted | Rosa multiflora | 2 | |
| Rosa pendulina | Accepted | Rosa pendulina | 1 | |
| Rosa pimpinellifolia | Unchecked | 1 | ||
| Rosa pouzinii | Accepted | Rosa pouzinii | 1 | |
| Rosa rhaetica | Accepted | Rosa rhaetica | 1 | |
| Rosa rubiginosa | Accepted | Rosa rubiginosa | 2 | |
| Rosa rugosa | Accepted | Rosa rugosa | 2 | |
| Rosa sempervirens | Accepted | Rosa sempervirens | 1 | |
| Rosa spinosissima | Accepted | Rosa spinosissima | 1 | |
| Rosa subcanina | Accepted | Rosa subcanina | 2 | |
| Rosa tomentella | Synonym | Rosa balsamica | 1 | |
| Rosa tomentosa | Accepted | Rosa tomentosa | 1 | |
| Rosa uriensis | Synonym | Rosa caesia subsp. vosagiaca | 1 | |
| Rosa villosa | Accepted | Rosa villosa | 2 | |
| Rosmarinus officinalis | Accepted | Rosmarinus officinalis | 1 | |
| Rostraria cristata | Accepted | Rostraria cristata | 2 | |
| Roupala montana | Accepted | Roupala montana | 1 | |
| Rubia peregrina | Accepted | Rubia peregrina | 1 | |
| Rubia tinctorum | Accepted | Rubia tinctorum | 1 | |
| Rubus | Accepted | Rubus | 1 | |
| Rubus arcticus | Accepted | Rubus arcticus | 1 | |
| Rubus armeniacus | Accepted | Rubus armeniacus | 1 | |
| Rubus caesius | Accepted | Rubus caesius | 2 | |
| Rubus chamaemorus | Accepted | Rubus chamaemorus | 1 | |
| Rubus fruticosus | Accepted | Rubus fruticosus | 1 | |
| Rubus grabowskii | Accepted | Rubus grabowskii | 1 | |
| Rubus idaeus | Accepted | Rubus idaeus | 2 | |
| Rubus mortensenii | Accepted | Rubus mortensenii | 1 | |
| Rubus nessensis | Accepted | Rubus nessensis | 1 | |
| Rubus odoratus | Accepted | Rubus odoratus | 1 | |
| Rubus pallidus | Accepted | Rubus pallidus | 1 | |
| Rubus plicatus | Accepted | Rubus plicatus | 1 | |
| Rubus radula | Accepted | Rubus radula | 1 | |
| Rubus saxatilis | Accepted | Rubus saxatilis | 2 | |
| Rubus ulmifolius | Accepted | Rubus ulmifolius | 1 | |
| Rubus wahlbergii | Accepted | Rubus wahlbergii | 1 | |
| Rudbeckia hirta | Accepted | Rudbeckia hirta | 1 | |
| Rudbeckia laciniata | Accepted | Rudbeckia laciniata | 2 | |
| Ruizterania albiflora | Accepted | Ruizterania albiflora | 1 | |
| Rumex acetosa | Accepted | Rumex acetosa | 3 | |
| Rumex acetosa subsp. acetosa | Synonym | Rumex acetosa | 1 | |
| Rumex acetosella | Accepted | Rumex acetosella | 3 | |
| Rumex acetosella | Accepted | Rumex acetosella | 1 | |
| Rumex alpestris | Accepted | Rumex alpestris | 2 | |
| Rumex alpinus | Accepted | Rumex alpinus | 2 | |
| Rumex aquaticus | Accepted | Rumex aquaticus | 3 | |
| Rumex arcticus | Synonym | Rumex aquaticus subsp. arcticus | 1 | |
| Rumex bucephalophorus subsp. gallicus | Accepted | Rumex bucephalophorus subsp. gallicus | 1 | |
| Rumex confertus | Accepted | Rumex confertus | 1 | |
| Rumex conglomeratus | Accepted | Rumex conglomeratus | 1 | |
| Rumex crispus | Accepted | Rumex crispus | 2 | |
| Rumex cristatus | Accepted | Rumex cristatus | 1 | |
| Rumex graminifolius | Accepted | Rumex graminifolius | 1 | |
| Rumex hydrolapathum | Accepted | Rumex hydrolapathum | 1 | |
| Rumex intermedius | Accepted | Rumex intermedius | 1 | |
| Rumex kerneri | Unchecked | 1 | ||
| Rumex longifolius | Accepted | Rumex longifolius | 2 | |
| Rumex maritimus | Accepted | Rumex maritimus | 2 | |
| Rumex nebroides | Accepted | Rumex nebroides | 2 | |
| Rumex nivalis | Accepted | Rumex nivalis | 1 | |
| Rumex obtusifolius | Accepted | Rumex obtusifolius | 2 | |
| Rumex obtusifolius subsp. obtusifolius | Synonym | Rumex obtusifolius | 1 | |
| Rumex palustris | Accepted | Rumex palustris | 1 | |
| Rumex papillaris | Synonym | Rumex thyrsiflorus subsp. papillaris | 1 | |
| Rumex patientia | Accepted | Rumex patientia | 1 | |
| Rumex pseudonatronatus | Accepted | Rumex pseudonatronatus | 1 | |
| Rumex pulcher | Accepted | Rumex pulcher | 1 | |
| Rumex pulcher | Accepted | Rumex pulcher | 1 | |
| Rumex sanguineus | Accepted | Rumex sanguineus | 2 | |
| Rumex scutatus | Accepted | Rumex scutatus | 1 | |
| Rumex sibiricus | Accepted | Rumex sibiricus | 1 | |
| Rumex stenophyllus | Accepted | Rumex stenophyllus | 1 | |
| Rumex thyrsiflorus | Accepted | Rumex thyrsiflorus | 2 | |
| Ruppia maritima | Accepted | Ruppia maritima | 1 | |
| Ruscus aculeatus | Accepted | Ruscus aculeatus | 1 | |
| Ruscus hypoglossum | Accepted | Ruscus hypoglossum | 1 | |
| Ruta angustifolia | Accepted | Ruta angustifolia | 1 | |
| Ruta graveolens | Accepted | Ruta graveolens | 1 | |
| Ruta montana | Accepted | Ruta montana | 1 | |
| Sabia japonica | Accepted | Sabia japonica | 1 | |
| Sacoglottis cydonioides | Accepted | Sacoglottis cydonioides | 1 | |
| Sagina apetala | Accepted | Sagina apetala | 1 | |
| Sagina caespitosa | Accepted | Sagina caespitosa | 1 | |
| Sagina glabra | Accepted | Sagina glabra | 1 | |
| Sagina maritima | Accepted | Sagina maritima | 1 | |
| Sagina nivalis | Accepted | Sagina nivalis | 1 | |
| Sagina nodosa | Accepted | Sagina nodosa | 3 | |
| Sagina procumbens | Accepted | Sagina procumbens | 2 | |
| Sagina saginoides | Accepted | Sagina saginoides | 2 | |
| Sagina subulata | Accepted | Sagina subulata | 2 | |
| Sagittaria latifolia | Accepted | Sagittaria latifolia | 1 | |
| Sagittaria sagittifolia | Accepted | Sagittaria sagittifolia | 2 | |
| Salicornia europaea | Accepted | Salicornia europaea | 1 | |
| Salicornia pojarkovae | Accepted | Salicornia pojarkovae | 1 | |
| Salix alaxensis | Accepted | Salix alaxensis | 1 | |
| Salix alba | Accepted | Salix alba | 1 | |
| Salix alba subsp. vitellina | Unchecked | 1 | ||
| Salix alpina | Accepted | Salix alpina | 1 | |
| Salix appendiculata | Accepted | Salix appendiculata | 1 | |
| Salix appenina | Unchecked | 1 | ||
| Salix arbuscula | Accepted | Salix arbuscula | 1 | |
| Salix arbusculoides | Accepted | Salix arbusculoides | 1 | |
| Salix arctica | Accepted | Salix arctica | 1 | |
| Salix arctophila | Accepted | Salix arctophila | 1 | |
| Salix aurita | Accepted | Salix aurita | 2 | |
| Salix bangongensis | Accepted | Salix bangongensis | 1 | |
| Salix bebbiana | Accepted | Salix bebbiana | 1 | |
| Salix bicolor | Accepted | Salix bicolor | 1 | |
| Salix boganidensis | Accepted | Salix boganidensis | 1 | |
| Salix breviserrata | Accepted | Salix breviserrata | 1 | |
| Salix caesia | Accepted | Salix caesia | 2 | |
| Salix caprea | Accepted | Salix caprea | 2 | |
| Salix caprea | Accepted | Salix caprea | 1 | |
| Salix caprea | Accepted | Salix caprea | 1 | |
| Salix chamissonis | Accepted | Salix chamissonis | 1 | |
| Salix cinerea | Accepted | Salix cinerea | 3 | |
| Salix daphnoides | Accepted | Salix daphnoides | 1 | |
| Salix discolor | Accepted | Salix discolor | 1 | |
| Salix eleagnos | Accepted | Salix eleagnos | 2 | |
| Salix foetida | Accepted | Salix foetida | 2 | |
| Salix fragilis | Synonym | Salix × fragilis | 2 | |
| Salix fuscescens | Accepted | Salix fuscescens | 1 | |
| Salix glabra | Accepted | Salix glabra | 1 | |
| Salix glauca | Accepted | Salix glauca | 1 | |
| Salix glauca | Accepted | Salix glauca | 1 | |
| Salix glaucosericea | Synonym | Salix glauca var. villosa | 1 | |
| Salix hastata | Accepted | Salix hastata | 4 | |
| Salix helvetica | Accepted | Salix helvetica | 1 | |
| Salix herbacea | Accepted | Salix herbacea | 2 | |
| Salix kitaibeliana | Synonym | Salix retusa | 1 | |
| Salix krylovii | Accepted | Salix krylovii | 1 | |
| Salix laggeri | Accepted | Salix laggeri | 1 | |
| Salix lanata | Accepted | Salix lanata | 3 | |
| Salix lapponum | Accepted | Salix lapponum | 1 | |
| Salix lasiandra | Accepted | Salix lasiandra | 1 | |
| Salix mielichhoferi | Accepted | Salix mielichhoferi | 1 | |
| Salix myrsinifolia | Accepted | Salix myrsinifolia | 3 | |
| Salix myrsinifolia | Accepted | Salix myrsinifolia | 1 | |
| Salix myrsinifolia subsp. borealis | Unchecked | 1 | ||
| Salix myrsinites | Accepted | Salix myrsinites | 1 | |
| Salix myrtilloides | Accepted | Salix myrtilloides | 2 | |
| Salix niphoclada | Accepted | Salix niphoclada | 1 | |
| Salix pentandra | Accepted | Salix pentandra | 1 | |
| Salix phlebophylla | Accepted | Salix phlebophylla | 1 | |
| Salix phylicifolia | Accepted | Salix phylicifolia | 1 | |
| Salix polaris | Accepted | Salix polaris | 1 | |
| Salix prolixa | Accepted | Salix prolixa | 1 | |
| Salix pulchra | Accepted | Salix pulchra | 1 | |
| Salix purpurea | Accepted | Salix purpurea | 1 | |
| Salix repens | Accepted | Salix repens | 2 | |
| Salix reticulata | Accepted | Salix reticulata | 2 | |
| Salix retusa | Accepted | Salix retusa | 1 | |
| Salix richardsonii | Synonym | Salix lanata subsp. richardsonii | 1 | |
| Salix rosmarinifolia | Accepted | Salix rosmarinifolia | 2 | |
| Salix rotundifolia | Accepted | Salix rotundifolia | 1 | |
| Salix serissima | Accepted | Salix serissima | 1 | |
| Salix serpyllifolia | Accepted | Salix serpyllifolia | 1 | |
| Salix silesiaca | Accepted | Salix silesiaca | 1 | |
| Salix triandra | Accepted | Salix triandra | 2 | |
| Salix uva-ursi | Accepted | Salix uva-ursi | 1 | |
| Salix viminalis | Accepted | Salix viminalis | 1 | |
| Salix waldsteiniana | Accepted | Salix waldsteiniana | 1 | |
| Salsola kali | Accepted | Salsola kali | 1 | |
| Salsola kali subsp. tragus | Accepted | Salsola kali subsp. tragus | 1 | |
| Salsola ruthenica | Synonym | Salsola kali subsp. ruthenica | 1 | |
| Salvia aethiopis | Accepted | Salvia aethiopis | 1 | |
| Salvia clandestina | Synonym | Salvia verbenaca | 1 | |
| Salvia glutinosa | Accepted | Salvia glutinosa | 1 | |
| Salvia officinalis | Accepted | Salvia officinalis | 1 | |
| Salvia officinalis subsp. gallica | Accepted | Salvia officinalis subsp. gallica | 1 | |
| Salvia pratensis | Accepted | Salvia pratensis | 1 | |
| Salvia pratensis subsp. bertolonii | Accepted | Salvia pratensis subsp. bertolonii | 1 | |
| Salvia saccardiana | Accepted | Salvia saccardiana | 1 | |
| Salvia sclarea | Accepted | Salvia sclarea | 1 | |
| Salvia sylvestris | Unchecked | 1 | ||
| Salvia verbenaca | Accepted | Salvia verbenaca | 1 | |
| Salvia verticillata | Accepted | Salvia verticillata | 1 | |
| Sambucus ebulus | Accepted | Sambucus ebulus | 1 | |
| Sambucus nigra | Accepted | Sambucus nigra | 1 | |
| Sambucus pubens | Synonym | Sambucus racemosa subsp. pubens | 1 | |
| Sambucus racemosa | Accepted | Sambucus racemosa | 1 | |
| Samolus valerandi | Accepted | Samolus valerandi | 1 | |
| Sandwithia guyanensis | Accepted | Sandwithia guyanensis | 2 | |
| Sanguisorba canadensis subsp. latifolia | Synonym | Sanguisorba stipulata | 1 | |
| Sanguisorba dodecandra | Accepted | Sanguisorba dodecandra | 1 | |
| Sanguisorba minor subsp. minor | Synonym | Sanguisorba minor | 1 | |
| Sanguisorba minor subsp. polygama | Synonym | Sanguisorba minor subsp. balearica | 1 | |
| Sanguisorba officinalis | Accepted | Sanguisorba officinalis | 2 | |
| Sanguisorba verrucosa | Accepted | Sanguisorba verrucosa | 1 | |
| Sanicula europaea | Accepted | Sanicula europaea | 2 | |
| Santolina chamaecyparissus | Accepted | Santolina chamaecyparissus | 1 | |
| Saponaria lutea | Accepted | Saponaria lutea | 1 | |
| Saponaria ocymoides | Accepted | Saponaria ocymoides | 1 | |
| Saponaria officinalis | Accepted | Saponaria officinalis | 2 | |
| Saponaria pumila | Unchecked | 1 | ||
| Sarracenia | Accepted | Sarracenia | 1 | |
| Sarracenia purpurea | Accepted | Sarracenia purpurea | 1 | |
| Sartidia isaloensis | Accepted | Sartidia isaloensis | 1 | |
| Satureja hortensis | Accepted | Satureja hortensis | 1 | |
| Satureja kitaibelii | Accepted | Satureja kitaibelii | 1 | |
| Satureja montana | Accepted | Satureja montana | 1 | |
| Satureja montana | Accepted | Satureja montana | 1 | |
| Satyria cerander | Accepted | Satyria cerander | 1 | |
| Saururus cernuus | Accepted | Saururus cernuus | 1 | |
| Saussurea alpina | Accepted | Saussurea alpina | 1 | |
| Saussurea alpina subsp. alpina | Synonym | Saussurea alpina | 1 | |
| Saussurea alpina subsp. depressa | Synonym | Saussurea depressa | 1 | |
| Saussurea discolor | Accepted | Saussurea discolor | 1 | |
| Saussurea pygmaea | Accepted | Saussurea pygmaea | 1 | |
| Saxifraga | Accepted | Saxifraga | 1 | |
| Saxifraga adscendens | Accepted | Saxifraga adscendens | 3 | |
| Saxifraga aizoides | Accepted | Saxifraga aizoides | 2 | |
| Saxifraga androsacea | Accepted | Saxifraga androsacea | 1 | |
| Saxifraga aphylla | Accepted | Saxifraga aphylla | 1 | |
| Saxifraga aquatica | Accepted | Saxifraga aquatica | 1 | |
| Saxifraga arachnoidea | Accepted | Saxifraga arachnoidea | 1 | |
| Saxifraga aspera | Accepted | Saxifraga aspera | 2 | |
| Saxifraga babiana | Accepted | Saxifraga babiana | 2 | |
| Saxifraga berica | Accepted | Saxifraga berica | 1 | |
| Saxifraga biflora | Accepted | Saxifraga biflora | 1 | |
| Saxifraga biternata | Accepted | Saxifraga biternata | 2 | |
| Saxifraga blavii | Accepted | Saxifraga blavii | 2 | |
| Saxifraga bourgaeana | Accepted | Saxifraga bourgaeana | 1 | |
| Saxifraga bryoides | Accepted | Saxifraga bryoides | 1 | |
| Saxifraga bulbifera | Accepted | Saxifraga bulbifera | 1 | |
| Saxifraga burseriana | Accepted | Saxifraga burseriana | 1 | |
| Saxifraga caesia | Accepted | Saxifraga caesia | 1 | |
| Saxifraga callosa | Accepted | Saxifraga callosa | 1 | |
| Saxifraga camposii | Accepted | Saxifraga camposii | 1 | |
| Saxifraga canaliculata | Accepted | Saxifraga canaliculata | 1 | |
| Saxifraga carpatica | Accepted | Saxifraga carpatica | 1 | |
| Saxifraga carpetana | Accepted | Saxifraga carpetana | 1 | |
| Saxifraga catalaunica | Synonym | Saxifraga callosa subsp. catalaunica | 1 | |
| Saxifraga cebennensis | Accepted | Saxifraga cebennensis | 1 | |
| Saxifraga cernua | Accepted | Saxifraga cernua | 3 | |
| Saxifraga cespitosa | Accepted | Saxifraga cespitosa | 2 | |
| Saxifraga cochlearis | Accepted | Saxifraga cochlearis | 1 | |
| Saxifraga conifera | Accepted | Saxifraga conifera | 1 | |
| Saxifraga continentalis | Synonym | Saxifraga fragosoi | 2 | |
| Saxifraga cotyledon | Accepted | Saxifraga cotyledon | 2 | |
| Saxifraga crustata | Accepted | Saxifraga crustata | 1 | |
| Saxifraga cuneata | Accepted | Saxifraga cuneata | 1 | |
| Saxifraga cuneifolia | Accepted | Saxifraga cuneifolia | 3 | |
| Saxifraga cuneifolia subsp. robusta | Accepted | Saxifraga cuneifolia subsp. robusta | 1 | |
| Saxifraga cymbalaria | Accepted | Saxifraga cymbalaria | 1 | |
| Saxifraga depressa | Accepted | Saxifraga depressa | 1 | |
| Saxifraga diapensioides | Accepted | Saxifraga diapensioides | 1 | |
| Saxifraga erioblasta | Accepted | Saxifraga erioblasta | 1 | |
| Saxifraga exarata subsp. ampullacea | Accepted | Saxifraga exarata subsp. ampullacea | 1 | |
| Saxifraga exarata subsp. carniolica | Accepted | Saxifraga exarata subsp. carniolica | 1 | |
| Saxifraga exarata subsp. delphinensis | Accepted | Saxifraga exarata subsp. delphinensis | 1 | |
| Saxifraga exarata subsp. exarata | Unchecked | 1 | ||
| Saxifraga exarata subsp. moschata | Accepted | Saxifraga exarata subsp. moschata | 1 | |
| Saxifraga facchinii | Accepted | Saxifraga facchinii | 1 | |
| Saxifraga flagellaris | Accepted | Saxifraga flagellaris | 1 | |
| Saxifraga florulenta | Accepted | Saxifraga florulenta | 2 | |
| Saxifraga fragilis | Accepted | Saxifraga fragilis | 1 | |
| Saxifraga fragosoi | Accepted | Saxifraga fragosoi | 1 | |
| Saxifraga funstonii | Accepted | Saxifraga funstonii | 1 | |
| Saxifraga gemmulosa | Accepted | Saxifraga gemmulosa | 1 | |
| Saxifraga geranioides | Accepted | Saxifraga geranioides | 1 | |
| Saxifraga glabella | Accepted | Saxifraga glabella | 1 | |
| Saxifraga globulifera | Accepted | Saxifraga globulifera | 2 | |
| Saxifraga granulata | Accepted | Saxifraga granulata | 2 | |
| Saxifraga haenseleri | Accepted | Saxifraga haenseleri | 1 | |
| Saxifraga hariotii | Accepted | Saxifraga hariotii | 1 | |
| Saxifraga hederifolia | Accepted | Saxifraga hederifolia | 1 | |
| Saxifraga heucherifolia | Synonym | Saxifraga rotundifolia | 1 | |
| Saxifraga hieraciifolia | Synonym | Micranthes hieraciifolia | 1 | |
| Saxifraga hirculus | Accepted | Saxifraga hirculus | 2 | |
| Saxifraga hirsuta | Accepted | Saxifraga hirsuta | 1 | |
| Saxifraga hohenwartii | Accepted | Saxifraga hohenwartii | 1 | |
| Saxifraga hostii subsp. rhaetica | Accepted | Saxifraga hostii subsp. rhaetica | 1 | |
| Saxifraga hyperborea | Accepted | Saxifraga hyperborea | 1 | |
| Saxifraga hypnoides | Accepted | Saxifraga hypnoides | 2 | |
| Saxifraga intricata | Accepted | Saxifraga intricata | 1 | |
| Saxifraga italica | Accepted | Saxifraga italica | 1 | |
| Saxifraga latepetiolata | Accepted | Saxifraga latepetiolata | 1 | |
| Saxifraga losae | Accepted | Saxifraga losae | 1 | |
| Saxifraga luteoviridis | Accepted | Saxifraga luteoviridis | 1 | |
| Saxifraga maderensis | Accepted | Saxifraga maderensis | 2 | |
| Saxifraga marginata | Accepted | Saxifraga marginata | 1 | |
| Saxifraga moncayensis | Accepted | Saxifraga moncayensis | 1 | |
| Saxifraga muscoides | Accepted | Saxifraga muscoides | 1 | |
| Saxifraga muscoides | Accepted | Saxifraga muscoides | 1 | |
| Saxifraga mutata | Accepted | Saxifraga mutata | 1 | |
| Saxifraga mutata subsp. demissa | Accepted | Saxifraga mutata subsp. demissa | 1 | |
| Saxifraga nathorstii | Accepted | Saxifraga nathorstii | 1 | |
| Saxifraga nelsoniana | Synonym | Micranthes nelsoniana | 1 | |
| Saxifraga oppositifolia | Accepted | Saxifraga oppositifolia | 1 | |
| Saxifraga oppositifolia subsp. blepharophylla | Accepted | Saxifraga oppositifolia subsp. blepharophylla | 1 | |
| Saxifraga oppositifolia subsp. oppositifolia | Synonym | Saxifraga oppositifolia | 1 | |
| Saxifraga oppositifolia subsp. rudolphiana | Accepted | Saxifraga oppositifolia subsp. rudolphiana | 1 | |
| Saxifraga paniculata | Accepted | Saxifraga paniculata | 1 | |
| Saxifraga paradoxa | Accepted | Saxifraga paradoxa | 1 | |
| Saxifraga pedemontana | Accepted | Saxifraga pedemontana | 1 | |
| Saxifraga pedemontana subsp. cymosa | Accepted | Saxifraga pedemontana subsp. cymosa | 1 | |
| Saxifraga pentadactylis | Accepted | Saxifraga pentadactylis | 1 | |
| Saxifraga petraea | Accepted | Saxifraga petraea | 1 | |
| Saxifraga platysepala | Synonym | Saxifraga flagellaris subsp. platysepala | 1 | |
| Saxifraga portosanctana | Accepted | Saxifraga portosanctana | 1 | |
| Saxifraga praetermissa | Accepted | Saxifraga praetermissa | 1 | |
| Saxifraga presolanensis | Accepted | Saxifraga presolanensis | 1 | |
| Saxifraga pubescens | Accepted | Saxifraga pubescens | 1 | |
| Saxifraga retusa subsp. augustata | Accepted | Saxifraga retusa subsp. augustata | 1 | |
| Saxifraga retusa subsp. retusa | Unchecked | 1 | ||
| Saxifraga rivularis | Accepted | Saxifraga rivularis | 2 | |
| Saxifraga rosacea | Accepted | Saxifraga rosacea | 2 | |
| Saxifraga rotundifolia | Accepted | Saxifraga rotundifolia | 2 | |
| Saxifraga sedoides | Accepted | Saxifraga sedoides | 1 | |
| Saxifraga seguieri | Accepted | Saxifraga seguieri | 1 | |
| Saxifraga spinulosa | Unchecked | 1 | ||
| Saxifraga squarrosa | Accepted | Saxifraga squarrosa | 1 | |
| Saxifraga stellaris | Synonym | Micranthes stellaris | 1 | |
| Saxifraga stolonifera | Accepted | Saxifraga stolonifera | 1 | |
| Saxifraga styriaca | Accepted | Saxifraga styriaca | 1 | |
| Saxifraga svalbardensis | Accepted | Saxifraga svalbardensis | 1 | |
| Saxifraga tenella | Accepted | Saxifraga tenella | 1 | |
| Saxifraga tombeanensis | Accepted | Saxifraga tombeanensis | 1 | |
| Saxifraga tricuspidata | Accepted | Saxifraga tricuspidata | 1 | |
| Saxifraga tridactylites | Accepted | Saxifraga tridactylites | 2 | |
| Saxifraga tridactylites | Accepted | Saxifraga tridactylites | 1 | |
| Saxifraga tridactylites | Accepted | Saxifraga tridactylites | 1 | |
| Saxifraga trifurcata | Accepted | Saxifraga trifurcata | 1 | |
| Saxifraga umbrosa | Accepted | Saxifraga umbrosa | 1 | |
| Saxifraga valdensis | Accepted | Saxifraga valdensis | 1 | |
| Saxifraga vandellii | Accepted | Saxifraga vandellii | 2 | |
| Saxifraga vayredana | Accepted | Saxifraga vayredana | 1 | |
| Saxifraga wahlenbergii | Accepted | Saxifraga wahlenbergii | 2 | |
| Scabiosa banatica | Synonym | Scabiosa columbaria subsp. banatica | 1 | |
| Scabiosa canescens | Accepted | Scabiosa canescens | 2 | |
| Scabiosa columbaria | Accepted | Scabiosa columbaria | 2 | |
| Scabiosa hladnikiana | Synonym | Scabiosa cinerea subsp. hladnikiana | 1 | |
| Scabiosa lucida | Accepted | Scabiosa lucida | 1 | |
| Scabiosa lucida subsp. stricta | Accepted | Scabiosa lucida subsp. stricta | 1 | |
| Scabiosa maritima | Synonym | Scabiosa atropurpurea | 1 | |
| Scabiosa ochroleuca | Accepted | Scabiosa ochroleuca | 1 | |
| Scabiosa triandra | Accepted | Scabiosa triandra | 1 | |
| Scabiosa velenovskiana | Accepted | Scabiosa velenovskiana | 1 | |
| Scabiosa vestina | Accepted | Scabiosa vestina | 1 | |
| Scabiosa vestita | Unchecked | 1 | ||
| Scandix australis | Accepted | Scandix australis | 1 | |
| Scandix pecten-veneris | Accepted | Scandix pecten-veneris | 1 | |
| Scandix stellata | Accepted | Scandix stellata | 1 | |
| Sceptridium multifidum | Synonym | Botrychium multifidum | 1 | |
| Schefflera morototoni | Synonym | Didymopanax morototoni | 1 | |
| Scheuchzeria palustris | Accepted | Scheuchzeria palustris | 2 | |
| Schismus barbatus | Accepted | Schismus barbatus | 1 | |
| Schlegelia violacea | Accepted | Schlegelia violacea | 1 | |
| Schoenoplectus × carinatus | Accepted | Schoenoplectus × carinatus | 1 | |
| Schoenoplectus lacustris | Accepted | Schoenoplectus lacustris | 1 | |
| Schoenoplectus mucronatus | Synonym | Schoenoplectiella mucronata | 1 | |
| Schoenoplectus supinus | Synonym | Schoenoplectiella supina | 2 | |
| Schoenoplectus tabernaemontani | Accepted | Schoenoplectus tabernaemontani | 1 | |
| Schoenoplectus triqueter | Accepted | Schoenoplectus triqueter | 1 | |
| Schoenus ferrugineus | Accepted | Schoenus ferrugineus | 2 | |
| Schoenus nigricans | Accepted | Schoenus nigricans | 1 | |
| Scilla autumnalis | Synonym | Prospero autumnale | 1 | |
| Scilla bifolia | Accepted | Scilla bifolia | 1 | |
| Scilla forbesii | Accepted | Scilla forbesii | 1 | |
| Scilla luciliae | Accepted | Scilla luciliae | 1 | |
| Scilla siberica | Accepted | Scilla siberica | 1 | |
| Scirpoides holoschoenus | Accepted | Scirpoides holoschoenus | 1 | |
| Scirpus atrovirens | Accepted | Scirpus atrovirens | 1 | |
| Scirpus sylvaticus | Accepted | Scirpus sylvaticus | 2 | |
| Scleranthus annuus | Accepted | Scleranthus annuus | 1 | |
| Scleranthus annuus subsp. annuus | Synonym | Scleranthus annuus | 1 | |
| Scleranthus annuus subsp. polycarpos | Synonym | Scleranthus annuus subsp. polycarpos | 1 | |
| Scleranthus perennis | Accepted | Scleranthus perennis | 3 | |
| Scleranthus perennis subsp. marginatus | Accepted | Scleranthus perennis subsp. marginatus | 1 | |
| Scleranthus uncinatus | Accepted | Scleranthus uncinatus | 1 | |
| Sclerochloa dura | Accepted | Sclerochloa dura | 1 | |
| Scolymus hispanicus | Accepted | Scolymus hispanicus | 1 | |
| Scopolia carniolica | Accepted | Scopolia carniolica | 1 | |
| Scorpiurus subvillosus | Synonym | Scorpiurus muricatus | 1 | |
| Scorzonera aristata | Accepted | Scorzonera aristata | 1 | |
| Scorzonera austriaca | Accepted | Scorzonera austriaca | 1 | |
| Scorzonera cana | Synonym | Podospermum canum | 1 | |
| Scorzonera hirsuta | Accepted | Scorzonera hirsuta | 1 | |
| Scorzonera hispanica | Accepted | Scorzonera hispanica | 1 | |
| Scorzonera humilis | Accepted | Scorzonera humilis | 2 | |
| Scorzonera laciniata subsp. laciniata | Synonym | Podospermum laciniatum | 1 | |
| Scorzonera purpurea | Synonym | Podospermum purpureum | 1 | |
| Scorzonera rosea | Synonym | Podospermum roseum subsp. roseum | 1 | |
| Scorzonera villosa | Accepted | Scorzonera villosa | 1 | |
| Scorzoneroides autumnalis | Accepted | Scorzoneroides autumnalis | 3 | |
| Scorzoneroides crocea | Accepted | Scorzoneroides crocea | 1 | |
| Scorzoneroides pseudotaraxaci | Accepted | Scorzoneroides pseudotaraxaci | 1 | |
| Scrophularia auriculata | Accepted | Scrophularia auriculata | 1 | |
| Scrophularia canina | Accepted | Scrophularia canina | 1 | |
| Scrophularia juratensis | Synonym | Scrophularia canina subsp. hoppii | 1 | |
| Scrophularia lucida | Accepted | Scrophularia lucida | 1 | |
| Scrophularia nodosa | Accepted | Scrophularia nodosa | 3 | |
| Scrophularia peregrina | Accepted | Scrophularia peregrina | 1 | |
| Scrophularia scopolii | Accepted | Scrophularia scopolii | 1 | |
| Scrophularia umbrosa | Synonym | Scrophularia oblongifolia | 2 | |
| Scrophularia vernalis | Accepted | Scrophularia vernalis | 1 | |
| Scutellaria albida subsp. velenovskyi | Accepted | Scutellaria albida subsp. velenovskyi | 1 | |
| Scutellaria alpina | Accepted | Scutellaria alpina | 1 | |
| Scutellaria altissima | Accepted | Scutellaria altissima | 1 | |
| Scutellaria galericulata | Accepted | Scutellaria galericulata | 3 | |
| Scutellaria hastifolia | Accepted | Scutellaria hastifolia | 1 | |
| Scutellaria hastifolia | Accepted | Scutellaria hastifolia | 1 | |
| Scutellaria minor | Accepted | Scutellaria minor | 1 | |
| Securigera varia | Synonym | Coronilla varia | 1 | |
| Sedum acre | Accepted | Sedum acre | 3 | |
| Sedum album | Accepted | Sedum album | 1 | |
| Sedum alpestre | Accepted | Sedum alpestre | 1 | |
| Sedum anacampseros | Synonym | Hylotelephium anacampseros | 1 | |
| Sedum anglicum | Accepted | Sedum anglicum | 1 | |
| Sedum annuum | Accepted | Sedum annuum | 3 | |
| Sedum anopetalum | Synonym | Petrosedum ochroleucum | 1 | |
| Sedum atratum | Accepted | Sedum atratum | 1 | |
| Sedum atratum subsp. carinthiacum | Synonym | Sedum atratum | 1 | |
| Sedum cepaea | Accepted | Sedum cepaea | 1 | |
| Sedum cespitosum | Accepted | Sedum cespitosum | 1 | |
| Sedum dasyphyllum | Accepted | Sedum dasyphyllum | 1 | |
| Sedum forsterianum | Synonym | Petrosedum forsterianum | 1 | |
| Sedum fragrans | Accepted | Sedum fragrans | 1 | |
| Sedum hispanicum | Accepted | Sedum hispanicum | 1 | |
| Sedum monregalense | Accepted | Sedum monregalense | 1 | |
| Sedum montanum | Synonym | Petrosedum montanum | 1 | |
| Sedum rubens | Accepted | Sedum rubens | 1 | |
| Sedum rupestre | Synonym | Sedum annuum | 1 | |
| Sedum sarmentosum | Accepted | Sedum sarmentosum | 1 | |
| Sedum sediforme | Synonym | Petrosedum sediforme | 1 | |
| Sedum sexangulare | Accepted | Sedum sexangulare | 1 | |
| Sedum telephium subsp. fabaria | Synonym | Hylotelephium telephium | 1 | |
| Sedum telephium subsp. maximum | Synonym | Hylotelephium maximum | 1 | |
| Sedum telephium subsp. telephium | Unchecked | 1 | ||
| Sedum villosum | Accepted | Sedum villosum | 2 | |
| Selaginella denticulata | Accepted | Selaginella denticulata | 1 | |
| Selaginella helvetica | Accepted | Selaginella helvetica | 1 | |
| Selaginella selaginoides | Accepted | Selaginella selaginoides | 2 | |
| Selaginella sibirica | Accepted | Selaginella sibirica | 1 | |
| Selinum carvifolium | Accepted | Selinum carvifolium | 2 | |
| Selinum silaifolium | Synonym | Cnidium silaifolium | 1 | |
| Sempervivum arachnoideum | Accepted | Sempervivum arachnoideum | 1 | |
| Sempervivum arachnoideum subsp. tomentosum | Accepted | Sempervivum arachnoideum subsp. tomentosum | 1 | |
| Sempervivum calcareum | Accepted | Sempervivum calcareum | 1 | |
| Sempervivum carpathicum subsp. heterophyllum | Accepted | Sempervivum carpathicum subsp. heterophyllum | 1 | |
| Sempervivum globiferum subsp. arenarium | Accepted | Sempervivum globiferum subsp. arenarium | 1 | |
| Sempervivum grandiflorum | Accepted | Sempervivum grandiflorum | 1 | |
| Sempervivum marmoreum | Accepted | Sempervivum marmoreum | 1 | |
| Sempervivum matricum | Synonym | Sempervivum marmoreum subsp. matricum | 1 | |
| Sempervivum montanum | Accepted | Sempervivum montanum | 1 | |
| Sempervivum montanum subsp. burnatii | Unchecked | 1 | ||
| Sempervivum montanum subsp. stiriacum | Accepted | Sempervivum montanum subsp. stiriacum | 1 | |
| Sempervivum pittonii | Accepted | Sempervivum pittonii | 1 | |
| Sempervivum tectorum | Accepted | Sempervivum tectorum | 1 | |
| Sempervivum wulfenii | Accepted | Sempervivum wulfenii | 1 | |
| Sempervivum zelebori | Synonym | Sempervivum ruthenicum | 1 | |
| Senecio abrotanifolius | Accepted | Senecio abrotanifolius | 1 | |
| Senecio adonidifolius | Synonym | Jacobaea adonidifolia | 1 | |
| Senecio alpinus | Synonym | Senecio albopurpureus | 1 | |
| Senecio aquaticus | Unchecked | 2 | ||
| Senecio cacaliaster | Accepted | Senecio cacaliaster | 1 | |
| Senecio cineraria | Synonym | Jacobaea maritima | 1 | |
| Senecio cordatus | Synonym | Synotis tetrantha | 1 | |
| Senecio doria | Accepted | Senecio doria | 1 | |
| Senecio doronicum | Accepted | Senecio doronicum | 1 | |
| Senecio doronicum subsp. gerardii | Synonym | Senecio provincialis | 1 | |
| Senecio doronicum subsp. transylvanicus | Accepted | Senecio doronicum subsp. transylvanicus | 1 | |
| Senecio eremophilus | Accepted | Senecio eremophilus | 1 | |
| Senecio erraticus | Synonym | Jacobaea erratica | 1 | |
| Senecio erucifolius | Synonym | Jacobaea erucifolia subsp. erucifolia | 2 | |
| Senecio gallicus | Accepted | Senecio gallicus | 1 | |
| Senecio germanicus subsp. germanicus | Synonym | Senecio nemorensis subsp. jacquinianus | 1 | |
| Senecio halleri | Synonym | Jacobaea uniflora | 1 | |
| Senecio hercynicus | Accepted | Senecio hercynicus | 1 | |
| Senecio inaequidens | Accepted | Senecio inaequidens | 1 | |
| Senecio incanus subsp. carniolicus | Synonym | Jacobaea carniolica | 1 | |
| Senecio incanus subsp. incanus | Synonym | Jacobaea incana | 1 | |
| Senecio incanus subsp. insubricus | Synonym | Jacobaea insubrica | 1 | |
| Senecio jacobaea | Synonym | Jacobaea vulgaris subsp. vulgaris | 1 | |
| Senecio lividus | Accepted | Senecio lividus | 1 | |
| Senecio lugens | Accepted | Senecio lugens | 1 | |
| Senecio nemorensis subsp. jacquinianus | Accepted | Senecio nemorensis subsp. jacquinianus | 1 | |
| Senecio ovatus | Accepted | Senecio ovatus | 1 | |
| Senecio ovatus subsp. alpestris | Accepted | Senecio ovatus subsp. alpestris | 1 | |
| Senecio paludosus | Synonym | Jacobaea paludosa subsp. paludosa | 1 | |
| Senecio pseudoarnica | Synonym | Jacobaea pseudoarnica | 1 | |
| Senecio rupestris | Synonym | Senecio squalidus subsp. rupestris | 1 | |
| Senecio subalpinus | Synonym | Jacobaea subalpina | 2 | |
| Senecio sylvaticus | Accepted | Senecio sylvaticus | 2 | |
| Senecio triangularis | Accepted | Senecio triangularis | 1 | |
| Senecio viscosus | Accepted | Senecio viscosus | 2 | |
| Senecio vulgaris | Accepted | Senecio vulgaris | 3 | |
| Serapias lingua | Accepted | Serapias lingua | 1 | |
| Serapias vomeracea | Accepted | Serapias vomeracea | 1 | |
| Serratula lycopifolia | Unchecked | 2 | ||
| Serratula nudicaulis | Synonym | Klasea nudicaulis | 1 | |
| Serratula tinctoria | Accepted | Serratula tinctoria | 1 | |
| Serratula tinctoria subsp. monticola | Accepted | Serratula tinctoria subsp. monticola | 1 | |
| Serratula tinctoria subsp. tinctoria | Unchecked | 1 | ||
| Sesamoides interrupta | Accepted | Sesamoides interrupta | 1 | |
| Sesamum orientale | Synonym | Sesamum indicum | 1 | |
| Seseli annuum subsp. annuum | Unchecked | 1 | ||
| Seseli annuum subsp. carvifolium | Accepted | Seseli annuum subsp. carvifolium | 1 | |
| Seseli austriacum | Accepted | Seseli austriacum | 1 | |
| Seseli elatum subsp. gouanii | Accepted | Seseli elatum subsp. gouanii | 1 | |
| Seseli elatum subsp. osseum | Accepted | Seseli elatum subsp. osseum | 1 | |
| Seseli galloprovinciale | Accepted | Seseli galloprovinciale | 1 | |
| Seseli gracile | Accepted | Seseli gracile | 1 | |
| Seseli hippomarathrum | Accepted | Seseli hippomarathrum | 1 | |
| Seseli kochii | Unchecked | 1 | ||
| Seseli libanotis | Accepted | Seseli libanotis | 2 | |
| Seseli libanotis subsp. intermedium | Accepted | Seseli libanotis subsp. intermedium | 1 | |
| Seseli longifolium | Accepted | Seseli longifolium | 1 | |
| Seseli montanum | Accepted | Seseli montanum | 1 | |
| Seseli osseum | Accepted | Seseli osseum | 1 | |
| Seseli pallasii | Accepted | Seseli pallasii | 2 | |
| Seseli peucedanoides | Accepted | Seseli peucedanoides | 1 | |
| Seseli rigidum | Accepted | Seseli rigidum | 1 | |
| Seseli tortuosum | Accepted | Seseli tortuosum | 2 | |
| Sesleria argentea | Accepted | Sesleria argentea | 1 | |
| Sesleria autumnalis | Accepted | Sesleria autumnalis | 1 | |
| Sesleria bielzii | Accepted | Sesleria bielzii | 1 | |
| Sesleria caerulea | Accepted | Sesleria caerulea | 1 | |
| Sesleria filifolia | Accepted | Sesleria filifolia | 1 | |
| Sesleria heufleriana | Accepted | Sesleria heufleriana | 1 | |
| Sesleria ovata | Accepted | Sesleria ovata | 1 | |
| Sesleria sadleriana | Accepted | Sesleria sadleriana | 2 | |
| Sesleria sphaerocephala | Accepted | Sesleria sphaerocephala | 1 | |
| Sesleria tatrae | Accepted | Sesleria tatrae | 1 | |
| Sesleria uliginosa | Synonym | Sesleria caerulea | 1 | |
| Setaria faberi | Accepted | Setaria faberi | 1 | |
| Setaria italica | Accepted | Setaria italica | 1 | |
| Setaria pumila | Accepted | Setaria pumila | 1 | |
| Setaria verticillata | Accepted | Setaria verticillata | 1 | |
| Setaria verticilliformis | Synonym | Setaria verticillata | 1 | |
| Setaria viridis | Accepted | Setaria viridis | 1 | |
| Setaria viridis subsp. pycnocoma | Synonym | Setaria viridis | 1 | |
| Sextonia rubra | Accepted | Sextonia rubra | 1 | |
| Sherardia arvensis | Accepted | Sherardia arvensis | 1 | |
| Sibbaldia procumbens | Accepted | Sibbaldia procumbens | 3 | |
| Sibbaldiopsis tridentata | Accepted | Sibbaldiopsis tridentata | 1 | |
| Sicyos angulatus | Accepted | Sicyos angulatus | 1 | |
| Sideritis hyssopifolia | Accepted | Sideritis hyssopifolia | 1 | |
| Sideritis montana | Accepted | Sideritis montana | 1 | |
| Sideritis provincialis | Synonym | Sideritis endressii | 1 | |
| Sideritis romana | Accepted | Sideritis romana | 1 | |
| Silaum silaus | Accepted | Silaum silaus | 1 | |
| Silene acaulis | Accepted | Silene acaulis | 3 | |
| Silene acaulis subsp. longiscapa | Synonym | Silene acaulis | 1 | |
| Silene armeria | Accepted | Silene armeria | 1 | |
| Silene campanula | Accepted | Silene campanula | 1 | |
| Silene conica | Accepted | Silene conica | 1 | |
| Silene cordifolia | Accepted | Silene cordifolia | 1 | |
| Silene coronaria | Accepted | Silene coronaria | 1 | |
| Silene dichotoma | Accepted | Silene dichotoma | 1 | |
| Silene dinarica | Accepted | Silene dinarica | 1 | |
| Silene dioica | Accepted | Silene dioica | 3 | |
| Silene elisabethae | Accepted | Silene elisabethae | 1 | |
| Silene exscapa | Synonym | Silene acaulis | 1 | |
| Silene flavescens | Accepted | Silene flavescens | 1 | |
| Silene flos-cuculi | Accepted | Silene flos-cuculi | 1 | |
| Silene flos-jovis | Accepted | Silene flos-jovis | 1 | |
| Silene gallica | Accepted | Silene gallica | 1 | |
| Silene hayekiana | Synonym | Silene saxifraga | 1 | |
| Silene heuffelii | Accepted | Silene heuffelii | 1 | |
| Silene involucrata | Accepted | Silene involucrata | 1 | |
| Silene italica | Accepted | Silene italica | 1 | |
| Silene latifolia subsp. alba | Accepted | Silene latifolia subsp. alba | 3 | |
| Silene lerchenfeldiana | Accepted | Silene lerchenfeldiana | 1 | |
| Silene menziesii | Accepted | Silene menziesii | 1 | |
| Silene nemoralis | Synonym | Silene italica subsp. nemoralis | 1 | |
| Silene nivalis | Accepted | Silene nivalis | 1 | |
| Silene noctiflora | Accepted | Silene noctiflora | 2 | |
| Silene nocturna | Accepted | Silene nocturna | 1 | |
| Silene nutans | Accepted | Silene nutans | 1 | |
| Silene nutans | Accepted | Silene nutans | 1 | |
| Silene nutans subsp. dubia | Accepted | Silene nutans subsp. dubia | 1 | |
| Silene nutans subsp. livida | Accepted | Silene nutans subsp. livida | 1 | |
| Silene ostenfeldii | Synonym | Silene taimyrensis | 1 | |
| Silene otites | Accepted | Silene otites | 2 | |
| Silene paradoxa | Accepted | Silene paradoxa | 1 | |
| Silene pauciflora | Synonym | Silene nodulosa | 1 | |
| Silene petrarchae | Unchecked | 1 | ||
| Silene portensis | Accepted | Silene portensis | 1 | |
| Silene pudibunda | Unchecked | 1 | ||
| Silene pusilla | Accepted | Silene pusilla | 1 | |
| Silene quadrifida | Synonym | Ixoca quadrifida | 1 | |
| Silene rupestris | Accepted | Silene rupestris | 1 | |
| Silene saxifraga | Accepted | Silene saxifraga | 1 | |
| Silene suecica | Accepted | Silene suecica | 1 | |
| Silene tatarica | Accepted | Silene tatarica | 1 | |
| Silene uniflora | Accepted | Silene uniflora | 2 | |
| Silene uralensis subsp. uralensis | Synonym | Silene uralensis | 1 | |
| Silene vallesia | Accepted | Silene vallesia | 1 | |
| Silene veselskyi | Accepted | Silene veselskyi | 1 | |
| Silene viridiflora | Accepted | Silene viridiflora | 1 | |
| Silene viscaria | Accepted | Silene viscaria | 1 | |
| Silene vulgaris | Accepted | Silene vulgaris | 1 | |
| Silene vulgaris subsp. glareosa | Synonym | Silene uniflora subsp. glareosa | 1 | |
| Silene vulgaris subsp. prostrata | Synonym | Silene uniflora subsp. prostrata | 1 | |
| Silene vulgaris subsp. vulgaris | Synonym | Silene vulgaris | 1 | |
| Silene wahlbergella | Synonym | Silene uralensis subsp. apetala | 2 | |
| Silene zawadzkii | Accepted | Silene zawadzkii | 1 | |
| Silybum marianum | Accepted | Silybum marianum | 2 | |
| Sinacalia tangutica | Accepted | Sinacalia tangutica | 1 | |
| Sinapis alba | Accepted | Sinapis alba | 1 | |
| Sinapis alba subsp. alba | Synonym | Sinapis alba | 1 | |
| Sinapis arvensis | Accepted | Sinapis arvensis | 2 | |
| Siparuna decipiens | Accepted | Siparuna decipiens | 1 | |
| Siparuna pachyantha | Accepted | Siparuna pachyantha | 1 | |
| Sison amomum | Accepted | Sison amomum | 1 | |
| Sisymbrella aspera | Accepted | Sisymbrella aspera | 1 | |
| Sisymbrium altissimum | Accepted | Sisymbrium altissimum | 1 | |
| Sisymbrium austriacum | Accepted | Sisymbrium austriacum | 1 | |
| Sisymbrium irio | Accepted | Sisymbrium irio | 1 | |
| Sisymbrium loeselii | Accepted | Sisymbrium loeselii | 1 | |
| Sisymbrium officinale | Accepted | Sisymbrium officinale | 2 | |
| Sisymbrium orientale | Accepted | Sisymbrium orientale | 1 | |
| Sisymbrium strictissimum | Accepted | Sisymbrium strictissimum | 1 | |
| Sisyrinchium montanum | Accepted | Sisyrinchium montanum | 2 | |
| Sium latifolium | Accepted | Sium latifolium | 2 | |
| Sloanea | Accepted | Sloanea | 1 | |
| Sloanea latifolia | Accepted | Sloanea latifolia | 1 | |
| Smelowskia borealis | Accepted | Smelowskia borealis | 1 | |
| Smilax aspera | Accepted | Smilax aspera | 1 | |
| Smyrnium olusatrum | Accepted | Smyrnium olusatrum | 1 | |
| Smyrnium perfoliatum | Accepted | Smyrnium perfoliatum | 1 | |
| Solanum chenopodioides | Accepted | Solanum chenopodioides | 2 | |
| Solanum dulcamara | Accepted | Solanum dulcamara | 2 | |
| Solanum nigrum | Accepted | Solanum nigrum | 2 | |
| Solanum nigrum subsp. schultesii | Synonym | Solanum nigrum | 1 | |
| Solanum nitidibaccatum | Accepted | Solanum nitidibaccatum | 1 | |
| Solanum rostratum | Accepted | Solanum rostratum | 1 | |
| Solanum tuberosum | Accepted | Solanum tuberosum | 1 | |
| Solanum villosum | Accepted | Solanum villosum | 2 | |
| Soldanella | Accepted | Soldanella | 1 | |
| Soldanella alpina | Accepted | Soldanella alpina | 5 | |
| Soldanella alpina subsp. cantabrica | Accepted | Soldanella alpina subsp. cantabrica | 2 | |
| Soldanella angusta | Unchecked | 3 | ||
| Soldanella austriaca | 1 | |||
| Soldanella calabrella | Accepted | Soldanella calabrella | 3 | |
| Soldanella carpatica | Accepted | Soldanella carpatica | 10 | |
| Soldanella chrysosticta | Accepted | Soldanella chrysosticta | 5 | |
| Soldanella hungarica | Accepted | Soldanella hungarica | 4 | |
| Soldanella hungarica | Accepted | Soldanella hungarica | 1 | |
| Soldanella major | Synonym | Soldanella hungarica subsp. major | 3 | |
| Soldanella marmarossiensis | Synonym | Soldanella hungarica | 1 | |
| Soldanella marmarossiensis | Synonym | Soldanella hungarica | 3 | |
| Soldanella minima | Accepted | Soldanella minima | 2 | |
| Soldanella minima | Accepted | Soldanella minima | 1 | |
| Soldanella minima subsp. samnitica | Unchecked | 1 | ||
| Soldanella montana | Accepted | Soldanella montana | 2 | |
| Soldanella montana subsp. gubalowkae | Unchecked | 1 | ||
| Soldanella oreodoxa | Unchecked | 2 | ||
| Soldanella pindicola | Accepted | Soldanella pindicola | 3 | |
| Soldanella pusilla | Accepted | Soldanella pusilla | 4 | |
| Soldanella pusilla subsp. alpicola | Accepted | Soldanella pusilla subsp. alpicola | 1 | |
| Soldanella rhodopaea | Accepted | Soldanella rhodopaea | 1 | |
| Soldanella rugosa | Unchecked | 2 | ||
| Soldanella tatricola | Unchecked | 1 | ||
| Soldanella villosa | Accepted | Soldanella villosa | 2 | |
| Solidago canadensis | Accepted | Solidago canadensis | 2 | |
| Solidago gigantea | Accepted | Solidago gigantea | 2 | |
| Solidago multiradiata | Accepted | Solidago multiradiata | 1 | |
| Solidago virgaurea | Accepted | Solidago virgaurea | 2 | |
| Solidago virgaurea subsp. alpestris | Unchecked | 1 | ||
| Solidago virgaurea subsp. minuta | Accepted | Solidago virgaurea subsp. minuta | 1 | |
| Sonchus arvensis | Accepted | Sonchus arvensis | 2 | |
| Sonchus arvensis subsp. uliginosus | Accepted | Sonchus arvensis subsp. uliginosus | 1 | |
| Sonchus asper | Accepted | Sonchus asper | 1 | |
| Sonchus asper subsp. asper | Unchecked | 1 | ||
| Sonchus asper subsp. glaucescens | Synonym | Sonchus glaucescens | 1 | |
| Sonchus oleraceus | Accepted | Sonchus oleraceus | 2 | |
| Sonchus palustris | Accepted | Sonchus palustris | 2 | |
| Sorbaria sorbifolia | Accepted | Sorbaria sorbifolia | 3 | |
| Sorbus americana | Accepted | Sorbus americana | 1 | |
| Sorbus aria | Accepted | Sorbus aria | 2 | |
| Sorbus aucuparia | Accepted | Sorbus aucuparia | 2 | |
| Sorbus aucuparia subsp. aucuparia | Synonym | Sorbus aucuparia | 2 | |
| Sorbus borbasii | Synonym | Hedlundia borbasii | 1 | |
| Sorbus chamaemespilus | Accepted | Sorbus chamaemespilus | 1 | |
| Sorbus dacica | Unchecked | 1 | ||
| Sorbus danubialis | Accepted | Sorbus danubialis | 1 | |
| Sorbus domestica | Accepted | Sorbus domestica | 1 | |
| Sorbus hybrida | Accepted | Sorbus hybrida | 1 | |
| Sorbus intermedia | Accepted | Sorbus intermedia | 1 | |
| Sorbus legrei | Synonym | Hedlundia legrei | 1 | |
| Sorbus meinichii | Synonym | Hedlundia meinichii | 1 | |
| Sorbus mougeotii | Accepted | Sorbus mougeotii | 1 | |
| Sorbus neglecta | Unchecked | 1 | ||
| Sorbus norvegica | Synonym | Aria obtusifolia | 1 | |
| Sorbus rupicola | Accepted | Sorbus rupicola | 1 | |
| Sorbus subsimilis | Synonym | Hedlundia subsimilis | 1 | |
| Sorbus torminalis | Accepted | Sorbus torminalis | 1 | |
| Sorghum halepense | Accepted | Sorghum halepense | 1 | |
| Sorocea bonplandii | Accepted | Sorocea bonplandii | 3 | |
| Sorocea jureiana | Accepted | Sorocea jureiana | 1 | |
| Sparganium angustifolium | Accepted | Sparganium angustifolium | 2 | |
| Sparganium emersum | Accepted | Sparganium emersum | 2 | |
| Sparganium erectum | Accepted | Sparganium erectum | 2 | |
| Sparganium erectum subsp. microcarpum | Accepted | Sparganium erectum subsp. microcarpum | 1 | |
| Sparganium erectum subsp. neglectum | Synonym | Sparganium erectum subsp. neglectum | 1 | |
| Sparganium glomeratum | Accepted | Sparganium glomeratum | 1 | |
| Sparganium hyperboreum | Accepted | Sparganium hyperboreum | 1 | |
| Sparganium minimum | Synonym | Sparganium natans | 1 | |
| Sparganium natans | Accepted | Sparganium natans | 2 | |
| Spartium junceum | Accepted | Spartium junceum | 1 | |
| Spergula arvensis | Accepted | Spergula arvensis | 2 | |
| Spergula arvensis var. sativa | Synonym | Spergula arvensis | 1 | |
| Spergula morisonii | Accepted | Spergula morisonii | 1 | |
| Spergula pentandra | Accepted | Spergula pentandra | 1 | |
| Spergularia maritima | Synonym | Spergularia media | 1 | |
| Spergularia media | Accepted | Spergularia media | 1 | |
| Spergularia rubra | Accepted | Spergularia rubra | 1 | |
| Spergularia salina | Synonym | Spergularia marina | 2 | |
| Sphenoclea zeylanica | Accepted | Sphenoclea zeylanica | 1 | |
| Spinacia oleracea | Accepted | Spinacia oleracea | 1 | |
| Spiraea betulifolia | Accepted | Spiraea betulifolia | 1 | |
| Spiraea billardii | Unchecked | 2 | ||
| Spiraea chamaedryfolia | Accepted | Spiraea chamaedryfolia | 2 | |
| Spiraea decumbens subsp. decumbens | Synonym | Spiraea decumbens | 1 | |
| Spiraea decumbens subsp. tomentosa | Accepted | Spiraea decumbens subsp. tomentosa | 1 | |
| Spiraea latifolia | Unchecked | 1 | ||
| Spiraea media | Accepted | Spiraea media | 1 | |
| Spiraea × rosalba | Accepted | Spiraea × rosalba | 1 | |
| Spiraea salicifolia | Accepted | Spiraea salicifolia | 1 | |
| Spiranthes aestivalis | Accepted | Spiranthes aestivalis | 2 | |
| Spiranthes spiralis | Accepted | Spiranthes spiralis | 1 | |
| Spirodela polyrhiza | Accepted | Spirodela polyrhiza | 1 | |
| Sporobolus halophilus | Accepted | Sporobolus halophilus | 1 | |
| Sporobolus indicus | Accepted | Sporobolus indicus | 1 | |
| Sporobolus neglectus | Accepted | Sporobolus neglectus | 1 | |
| Sporobolus subtilis | Accepted | Sporobolus subtilis | 1 | |
| Sporobolus vaginiflorus | Accepted | Sporobolus vaginiflorus | 2 | |
| Stachys alopecuros subsp. alopecuros | Synonym | Stachys alopecuros | 1 | |
| Stachys alopecuros subsp. godronii | Synonym | Stachys alopecuros | 2 | |
| Stachys alpina | Accepted | Stachys alpina | 1 | |
| Stachys annua | Accepted | Stachys annua | 1 | |
| Stachys arvensis | Accepted | Stachys arvensis | 2 | |
| Stachys byzantina | Accepted | Stachys byzantina | 2 | |
| Stachys cretica subsp. salviifolia | Accepted | Stachys cretica subsp. salviifolia | 1 | |
| Stachys germanica | Accepted | Stachys germanica | 2 | |
| Stachys heraclea | Accepted | Stachys heraclea | 1 | |
| Stachys macrantha | Accepted | Stachys macrantha | 1 | |
| Stachys officinalis subsp. officinalis | Synonym | Stachys officinalis | 1 | |
| Stachys officinalis subsp. serotina | Accepted | Stachys officinalis subsp. serotina | 1 | |
| Stachys palustris | Accepted | Stachys palustris | 2 | |
| Stachys pradica | Accepted | Stachys pradica | 1 | |
| Stachys recta | Accepted | Stachys recta | 1 | |
| Stachys recta subsp. grandiflora | Synonym | Stachys recta subsp. labiosa | 1 | |
| Stachys recta subsp. subcrenata | Accepted | Stachys recta subsp. subcrenata | 1 | |
| Stachys sylvatica | Accepted | Stachys sylvatica | 2 | |
| Stachyurus himalaicus | Accepted | Stachyurus himalaicus | 1 | |
| Staehelina dubia | Accepted | Staehelina dubia | 1 | |
| Staphylea pinnata | Accepted | Staphylea pinnata | 2 | |
| Stegnosperma cubense | Accepted | Stegnosperma cubense | 1 | |
| Steinchisma laxum | Accepted | Steinchisma laxum | 1 | |
| Stellaria alaskana | Accepted | Stellaria alaskana | 1 | |
| Stellaria alsine | Synonym | Stellaria uliginosa | 1 | |
| Stellaria borealis | Accepted | Stellaria borealis | 1 | |
| Stellaria crassifolia | Accepted | Stellaria crassifolia | 1 | |
| Stellaria crassipes | Accepted | Stellaria crassipes | 1 | |
| Stellaria fennica | Accepted | Stellaria fennica | 1 | |
| Stellaria graminea | Accepted | Stellaria graminea | 2 | |
| Stellaria hebecalyx | Accepted | Stellaria hebecalyx | 1 | |
| Stellaria holostea | Accepted | Stellaria holostea | 1 | |
| Stellaria humifusa | Accepted | Stellaria humifusa | 1 | |
| Stellaria longifolia | Accepted | Stellaria longifolia | 2 | |
| Stellaria longipes | Accepted | Stellaria longipes | 1 | |
| Stellaria media | Accepted | Stellaria media | 2 | |
| Stellaria neglecta | Accepted | Stellaria neglecta | 1 | |
| Stellaria nemorum | Accepted | Stellaria nemorum | 2 | |
| Stellaria nemorum var. montana | Synonym | Stellaria cuspidata | 2 | |
| Stellaria pallida | Accepted | Stellaria pallida | 1 | |
| Stellaria palustris | Accepted | Stellaria palustris | 3 | |
| Stellaria ponojensis | Synonym | Stellaria hebecalyx | 1 | |
| Stemmacantha heleniifolia subsp. bicknellii | Synonym | Leuzea rhapontica subsp. bicknellii | 1 | |
| Stemmacantha rhapontica subsp. lamarckii | Unchecked | 1 | ||
| Stemmacantha rhapontica subsp. rhapontica | Synonym | Leuzea rhapontica | 1 | |
| Sternbergia lutea | Accepted | Sternbergia lutea | 1 | |
| Stipa bromoides | Accepted | Stipa bromoides | 1 | |
| Stipa capillata | Accepted | Stipa capillata | 1 | |
| Stipa crassiculmis subsp. heterotricha | Synonym | Stipa pulcherrima | 1 | |
| Stipa danubialis | Synonym | Stipa pennata subsp. pennata | 1 | |
| Stipa eriocaulis subsp. austriaca | Synonym | Stipa pennata | 1 | |
| Stipa feltrina | Unchecked | 1 | ||
| Stipa offneri | Accepted | Stipa offneri | 1 | |
| Stipa pennata | Accepted | Stipa pennata | 1 | |
| Stipa pennata | Accepted | Stipa pennata | 1 | |
| Strasburgeria robusta | Accepted | Strasburgeria robusta | 1 | |
| Stratiotes aloides | Accepted | Stratiotes aloides | 1 | |
| Streptopus amplexifolius | Accepted | Streptopus amplexifolius | 2 | |
| Struthiopteris spicant | Synonym | Blechnum spicant | 1 | |
| Strychnos | Accepted | Strychnos | 1 | |
| Stuckenia filiformis | Accepted | Stuckenia filiformis | 1 | |
| Stuckenia vaginata | Accepted | Stuckenia vaginata | 2 | |
| Styrax guyanensis | Accepted | Styrax guyanensis | 1 | |
| Suaeda calceoliformis | Accepted | Suaeda calceoliformis | 1 | |
| Suaeda maritima | Accepted | Suaeda maritima | 1 | |
| Suaeda vera | Accepted | Suaeda vera | 1 | |
| Subularia aquatica | Accepted | Subularia aquatica | 2 | |
| Succisa pratensis | Accepted | Succisa pratensis | 2 | |
| Suriana maritima | Accepted | Suriana maritima | 1 | |
| Swartzia polyphylla | Accepted | Swartzia polyphylla | 1 | |
| Swertia perennis | Accepted | Swertia perennis | 1 | |
| Swertia punctata | Accepted | Swertia punctata | 1 | |
| Symphonia globulifera | Accepted | Symphonia globulifera | 1 | |
| Symphoricarpos albus | Accepted | Symphoricarpos albus | 2 | |
| Symphyotrichum ciliolatum | Accepted | Symphyotrichum ciliolatum | 1 | |
| Symphyotrichum pygmaeum | Accepted | Symphyotrichum pygmaeum | 1 | |
| Symphytum cordatum | Accepted | Symphytum cordatum | 1 | |
| Symphytum officinale | Accepted | Symphytum officinale | 1 | |
| Symphytum tuberosum | Accepted | Symphytum tuberosum | 1 | |
| Symphytum tuberosum | Accepted | Symphytum tuberosum | 1 | |
| Symplocos martinicensis | Accepted | Symplocos martinicensis | 1 | |
| Synsepalum stipulatum | Accepted | Synsepalum stipulatum | 1 | |
| Syringa josikaea | Accepted | Syringa josikaea | 2 | |
| Syringa vulgaris | Accepted | Syringa vulgaris | 2 | |
| Tabebuia capitata | Synonym | Handroanthus capitatus | 1 | |
| Tachigali guianensis | Accepted | Tachigali guianensis | 1 | |
| Talinum paniculatum | Accepted | Talinum paniculatum | 1 | |
| Talisia simaboides | Accepted | Talisia simaboides | 1 | |
| Tamarix gallica | Accepted | Tamarix gallica | 1 | |
| Tamus communis | Synonym | Dioscorea communis | 1 | |
| Tanacetum bipinnatum | Accepted | Tanacetum bipinnatum | 1 | |
| Tanacetum cinerariifolium | Accepted | Tanacetum cinerariifolium | 1 | |
| Tanacetum corymbosum | Accepted | Tanacetum corymbosum | 1 | |
| Tanacetum corymbosum subsp. subcorymbosum | Accepted | Tanacetum corymbosum subsp. subcorymbosum | 1 | |
| Tanacetum macrophyllum | Accepted | Tanacetum macrophyllum | 2 | |
| Tanacetum parthenium | Accepted | Tanacetum parthenium | 1 | |
| Tanacetum parthenium | Accepted | Tanacetum parthenium | 1 | |
| Tanacetum vulgare | Accepted | Tanacetum vulgare | 2 | |
| Tapirira obtusa | Accepted | Tapirira obtusa | 1 | |
| Tapura amazonica | Accepted | Tapura amazonica | 1 | |
| Tapura capitulifera | Accepted | Tapura capitulifera | 2 | |
| Taraxacum | Accepted | Taraxacum | 1 | |
| Taraxacum acromaurum | Synonym | Taraxacum cymbifolium | 1 | |
| Taraxacum alpestre | Accepted | Taraxacum alpestre | 1 | |
| Taraxacum alpinum | Unchecked | 1 | ||
| Taraxacum arcticum | Accepted | Taraxacum arcticum | 1 | |
| Taraxacum brachyceras | Accepted | Taraxacum brachyceras | 1 | |
| Taraxacum brachyrhynchum | Accepted | Taraxacum brachyrhynchum | 1 | |
| Taraxacum ceratophorum | Accepted | Taraxacum ceratophorum | 1 | |
| Taraxacum ceratophorum | Accepted | Taraxacum ceratophorum | 1 | |
| Taraxacum cornutum | Accepted | Taraxacum cornutum | 1 | |
| Taraxacum croceum | Accepted | Taraxacum croceum | 1 | |
| Taraxacum cymbifolium | Accepted | Taraxacum cymbifolium | 1 | |
| Taraxacum dissectum | Accepted | Taraxacum dissectum | 1 | |
| Taraxacum erythrospermum | Accepted | Taraxacum erythrospermum | 2 | |
| Taraxacum eximium | Accepted | Taraxacum eximium | 1 | |
| Taraxacum handelii | Accepted | Taraxacum handelii | 1 | |
| Taraxacum hirtellum | Accepted | Taraxacum hirtellum | 1 | |
| Taraxacum lacerum | Synonym | Taraxacum ceratophorum | 1 | |
| Taraxacum laevigatum | Synonym | Taraxacum erythrospermum | 1 | |
| Taraxacum maculigerum | Accepted | Taraxacum maculigerum | 1 | |
| Taraxacum naevosum | Synonym | Taraxacum croceum | 1 | |
| Taraxacum norvegicum | Accepted | Taraxacum norvegicum | 1 | |
| Taraxacum obliquum | Accepted | Taraxacum obliquum | 1 | |
| Taraxacum obovatum | Accepted | Taraxacum obovatum | 1 | |
| Taraxacum officinale | Accepted | Taraxacum officinale | 1 | |
| Taraxacum oreinum | Accepted | Taraxacum oreinum | 1 | |
| Taraxacum pacheri | Accepted | Taraxacum pacheri | 1 | |
| Taraxacum palustre | Accepted | Taraxacum palustre | 1 | |
| Taraxacum pectinatiforme | Accepted | Taraxacum pectinatiforme | 1 | |
| Taraxacum phymatocarpum | Accepted | Taraxacum phymatocarpum | 1 | |
| Taraxacum pieninicum | Accepted | Taraxacum pieninicum | 1 | |
| Taraxacum platyglossum | Accepted | Taraxacum platyglossum | 1 | |
| Taraxacum purpuridens | Accepted | Taraxacum purpuridens | 1 | |
| Taraxacum recedens | Accepted | Taraxacum recedens | 1 | |
| Taraxacum schroeterianum | Accepted | Taraxacum schroeterianum | 1 | |
| Taraxacum spectabile | Accepted | Taraxacum spectabile | 2 | |
| Taraxacum stictophyllum | Accepted | Taraxacum stictophyllum | 1 | |
| Taraxacum tenebricans | Accepted | Taraxacum tenebricans | 1 | |
| Taraxacum torvum | Accepted | Taraxacum torvum | 1 | |
| Taraxacum xiphoideum | Accepted | Taraxacum xiphoideum | 1 | |
| Taxus baccata | Accepted | Taxus baccata | 1 | |
| Teesdalia coronopifolia | Accepted | Teesdalia coronopifolia | 1 | |
| Teesdalia nudicaulis | Accepted | Teesdalia nudicaulis | 1 | |
| Telekia speciosa | Accepted | Telekia speciosa | 3 | |
| Telekia speciosissima | Accepted | Telekia speciosissima | 1 | |
| Telephium imperati | Accepted | Telephium imperati | 1 | |
| Tellima grandiflora | Accepted | Tellima grandiflora | 1 | |
| Tephroseris atropurpurea | Synonym | Tephroseris integrifolia subsp. atropurpurea | 1 | |
| Tephroseris aurantiaca | Synonym | Tephroseris integrifolia subsp. aurantiaca | 1 | |
| Tephroseris balbisiana | Accepted | Tephroseris balbisiana | 1 | |
| Tephroseris capitata | Synonym | Tephroseris integrifolia subsp. capitata | 1 | |
| Tephroseris frigida | Accepted | Tephroseris frigida | 1 | |
| Tephroseris helenitis | Accepted | Tephroseris helenitis | 1 | |
| Tephroseris integrifolia | Accepted | Tephroseris integrifolia | 2 | |
| Tephroseris integrifolia subsp. tundricola | Accepted | Tephroseris integrifolia subsp. tundricola | 1 | |
| Tephroseris papposa | Accepted | Tephroseris papposa | 1 | |
| Tephroseris serpentini | Synonym | Tephroseris integrifolia subsp. serpentini | 1 | |
| Tephroseris tenuifolia | Synonym | Tephroseris helenitis subsp. helenitis | 1 | |
| Tephroseris yukonensis | Accepted | Tephroseris yukonensis | 1 | |
| Terminalia glabrescens | Accepted | Terminalia glabrescens | 1 | |
| Terminalia guyanensis | Accepted | Terminalia guyanensis | 1 | |
| Ternstroemia dentata | Accepted | Ternstroemia dentata | 1 | |
| Tetragastris altissima | Synonym | Protium excelsior | 1 | |
| Tetragastris panamensis | Synonym | Protium stevensonii | 2 | |
| Tetragonolobus maritimus | Synonym | Lotus maritimus | 1 | |
| Tetrapterys crispa | Accepted | Tetrapterys crispa | 1 | |
| Teucrium aristatum subsp. cravense | Synonym | Teucrium aristatum | 1 | |
| Teucrium botrys | Accepted | Teucrium botrys | 1 | |
| Teucrium chamaedrys | Accepted | Teucrium chamaedrys | 1 | |
| Teucrium flavum | Accepted | Teucrium flavum | 1 | |
| Teucrium fruticans | Accepted | Teucrium fruticans | 1 | |
| Teucrium lucidum | Accepted | Teucrium lucidum | 2 | |
| Teucrium luteum | Accepted | Teucrium luteum | 1 | |
| Teucrium montanum | Accepted | Teucrium montanum | 1 | |
| Teucrium polium | Accepted | Teucrium polium | 1 | |
| Teucrium pyrenaicum | Accepted | Teucrium pyrenaicum | 1 | |
| Teucrium scordium | Accepted | Teucrium scordium | 2 | |
| Teucrium scorodonia | Accepted | Teucrium scorodonia | 2 | |
| Thalictrum alpinum | Accepted | Thalictrum alpinum | 3 | |
| Thalictrum aquilegiifolium | Accepted | Thalictrum aquilegiifolium | 2 | |
| Thalictrum flavum | Accepted | Thalictrum flavum | 2 | |
| Thalictrum foetidum | Accepted | Thalictrum foetidum | 1 | |
| Thalictrum kemense | Unchecked | 1 | ||
| Thalictrum lucidum | Accepted | Thalictrum lucidum | 1 | |
| Thalictrum minus | Accepted | Thalictrum minus | 1 | |
| Thalictrum minus subsp. minus | Unchecked | 2 | ||
| Thalictrum minus subsp. saxatile | Unchecked | 1 | ||
| Thalictrum pubescens | Accepted | Thalictrum pubescens | 1 | |
| Thalictrum simplex | Accepted | Thalictrum simplex | 1 | |
| Thalictrum simplex subsp. boreale | Accepted | Thalictrum simplex subsp. boreale | 1 | |
| Thalictrum simplex var. bauhini | Synonym | Thalictrum simplex | 1 | |
| Thapsia villosa | Accepted | Thapsia villosa | 1 | |
| Thelypteris palustris | Accepted | Thelypteris palustris | 3 | |
| Theobroma subincana | Accepted | Theobroma subincana | 1 | |
| Thesium alpinum | Accepted | Thesium alpinum | 1 | |
| Thesium arvense | Synonym | Thesium linophyllon | 1 | |
| Thesium bavarum | Accepted | Thesium bavarum | 1 | |
| Thesium divaricatum | Accepted | Thesium divaricatum | 1 | |
| Thesium humifusum | Accepted | Thesium humifusum | 1 | |
| Thesium kernerianum | Accepted | Thesium kernerianum | 1 | |
| Thesium linophyllon | Accepted | Thesium linophyllon | 1 | |
| Thesium pyrenaicum | Accepted | Thesium pyrenaicum | 1 | |
| Thesium rostratum | Accepted | Thesium rostratum | 1 | |
| Thladiantha dubia | Accepted | Thladiantha dubia | 1 | |
| Thlaspi alliaceum | Synonym | Mummenhoffia alliacea | 1 | |
| Thlaspi alpestre | Synonym | Thlaspi caerulescens | 1 | |
| Thlaspi alpinum subsp. alpinum | Synonym | Noccaea alpestris | 1 | |
| Thlaspi alpinum subsp. alpinum | Synonym | Noccaea alpestris | 1 | |
| Thlaspi alpinum subsp. sylvium | Synonym | Noccaea sylvia | 1 | |
| Thlaspi arvense | Accepted | Thlaspi arvense | 2 | |
| Thlaspi brachypetalum | Synonym | Noccaea caerulescens subsp. brachypetala | 1 | |
| Thlaspi caerulescens | Accepted | Thlaspi caerulescens | 1 | |
| Thlaspi dacicum subsp. banaticum | Accepted | Thlaspi dacicum subsp. banaticum | 1 | |
| Thlaspi jankae | Synonym | Noccaea jankae | 1 | |
| Thlaspi montanum | Synonym | Noccaea montana | 1 | |
| Thlaspi perfoliatum | Synonym | Noccaea perfoliata | 1 | |
| Thlaspi praecox | Synonym | Noccaea praecox | 1 | |
| Thlaspi rotundifolium subsp. cepaeifolium | Accepted | Thlaspi rotundifolium subsp. cepaeifolium | 1 | |
| Thlaspi rotundifolium subsp. corymbosum | Synonym | Noccaea rotundifolia | 1 | |
| Thlaspi rotundifolium subsp. rotundifolium | Synonym | Noccaea rotundifolia | 1 | |
| Thlaspi virens | Synonym | Noccaea caerulescens subsp. virens | 1 | |
| Thomandersia laurifolia | Accepted | Thomandersia laurifolia | 1 | |
| Thuja plicata | Accepted | Thuja plicata | 1 | |
| Thurnia sphaerocephala | Accepted | Thurnia sphaerocephala | 1 | |
| Thymelaea dioica | Accepted | Thymelaea dioica | 1 | |
| Thymelaea passerina | Accepted | Thymelaea passerina | 1 | |
| Thymus | Accepted | Thymus | 1 | |
| Thymus bihoriensis | Accepted | Thymus bihoriensis | 1 | |
| Thymus comosus | Accepted | Thymus comosus | 1 | |
| Thymus embergeri | Accepted | Thymus embergeri | 1 | |
| Thymus kosteleckyanus | Accepted | Thymus kosteleckyanus | 1 | |
| Thymus longicaulis | Accepted | Thymus longicaulis | 1 | |
| Thymus odoratissimus | Accepted | Thymus odoratissimus | 1 | |
| Thymus oenipontanus | Accepted | Thymus oenipontanus | 1 | |
| Thymus praecox subsp. arcticus | Unchecked | 1 | ||
| Thymus praecox subsp. arcticus | Unchecked | 1 | ||
| Thymus praecox subsp. jankae | Accepted | Thymus praecox subsp. jankae | 1 | |
| Thymus praecox subsp. polytrichus | Accepted | Thymus praecox subsp. polytrichus | 1 | |
| Thymus pulcherrimus | Accepted | Thymus pulcherrimus | 1 | |
| Thymus pulegioides | Accepted | Thymus pulegioides | 2 | |
| Thymus pulegioides subsp. carniolicus | Synonym | Thymus pulegioides subsp. pannonicus | 1 | |
| Thymus serpyllum subsp. tanaensis | Accepted | Thymus serpyllum subsp. tanaensis | 1 | |
| Thymus vulgaris | Accepted | Thymus vulgaris | 1 | |
| Thyrsodium guianense | Accepted | Thyrsodium guianense | 1 | |
| Tibouchina pulchra | Synonym | Pleroma raddianum | 1 | |
| Tibouchina stenocarpa | Synonym | Pleroma stenocarpum | 1 | |
| Ticodendron incognitum | Accepted | Ticodendron incognitum | 1 | |
| Tilia cordata | Accepted | Tilia cordata | 2 | |
| Tilia platyphyllos | Accepted | Tilia platyphyllos | 1 | |
| Tofieldia calyculata | Accepted | Tofieldia calyculata | 1 | |
| Tofieldia coccinea | Accepted | Tofieldia coccinea | 1 | |
| Tofieldia pusilla | Accepted | Tofieldia pusilla | 2 | |
| Tordylium maximum | Accepted | Tordylium maximum | 1 | |
| Torilis arvensis | Accepted | Torilis arvensis | 1 | |
| Torilis japonica | Accepted | Torilis japonica | 2 | |
| Torilis leptophylla | Accepted | Torilis leptophylla | 1 | |
| Torilis nodosa | Accepted | Torilis nodosa | 1 | |
| Tozzia alpina | Accepted | Tozzia alpina | 2 | |
| Trachycarpus fortunei | Accepted | Trachycarpus fortunei | 1 | |
| Tragopogon crocifolius | Accepted | Tragopogon crocifolius | 1 | |
| Tragopogon dubius | Accepted | Tragopogon dubius | 1 | |
| Tragopogon porrifolius subsp. australis | Accepted | Tragopogon porrifolius subsp. australis | 1 | |
| Tragopogon pratensis | Accepted | Tragopogon pratensis | 2 | |
| Tragopogon pratensis subsp. minor | Synonym | Tragopogon pratensis subsp. minor | 1 | |
| Tragopogon pratensis subsp. orientalis | Synonym | Tragopogon orientalis | 1 | |
| Tragus racemosus | Accepted | Tragus racemosus | 1 | |
| Transberingia bursifolia | Synonym | Crucihimalaya bursifolia | 1 | |
| Trapa natans | Accepted | Trapa natans | 1 | |
| Traunsteinera globosa | Accepted | Traunsteinera globosa | 1 | |
| Triantha occidentalis | Accepted | Triantha occidentalis | 1 | |
| Tribulus terrestris | Accepted | Tribulus terrestris | 1 | |
| Trichilia casaretti | Accepted | Trichilia casaretti | 1 | |
| Trichilia catigua | Accepted | Trichilia catigua | 1 | |
| Trichilia claussenii | Accepted | Trichilia claussenii | 1 | |
| Trichilia elegans | Accepted | Trichilia elegans | 1 | |
| Trichilia lepidota | Accepted | Trichilia lepidota | 1 | |
| Trichilia pallens | Accepted | Trichilia pallens | 1 | |
| Trichilia pallida | Accepted | Trichilia pallida | 3 | |
| Trichophorum alpinum | Accepted | Trichophorum alpinum | 2 | |
| Trichophorum cespitosum | Accepted | Trichophorum cespitosum | 3 | |
| Trichophorum cespitosum | Accepted | Trichophorum cespitosum | 1 | |
| Trichophorum pumilum | Accepted | Trichophorum pumilum | 2 | |
| Trientalis europaea | Synonym | Lysimachia europaea | 2 | |
| Trifolium alexandrinum | Accepted | Trifolium alexandrinum | 1 | |
| Trifolium alpestre | Accepted | Trifolium alpestre | 2 | |
| Trifolium alpinum | Accepted | Trifolium alpinum | 1 | |
| Trifolium angustifolium | Accepted | Trifolium angustifolium | 1 | |
| Trifolium arvense | Accepted | Trifolium arvense | 2 | |
| Trifolium aureum | Accepted | Trifolium aureum | 2 | |
| Trifolium badium | Accepted | Trifolium badium | 1 | |
| Trifolium campestre | Accepted | Trifolium campestre | 2 | |
| Trifolium cherleri | Accepted | Trifolium cherleri | 1 | |
| Trifolium dubium | Accepted | Trifolium dubium | 2 | |
| Trifolium fragiferum | Accepted | Trifolium fragiferum | 1 | |
| Trifolium glomeratum | Accepted | Trifolium glomeratum | 1 | |
| Trifolium hybridum | Accepted | Trifolium hybridum | 2 | |
| Trifolium hybridum subsp. elegans | Accepted | Trifolium hybridum subsp. elegans | 1 | |
| Trifolium incarnatum subsp. incarnatum | Synonym | Trifolium incarnatum | 1 | |
| Trifolium incarnatum subsp. molinerii | Synonym | Trifolium incarnatum | 1 | |
| Trifolium lappaceum | Accepted | Trifolium lappaceum | 1 | |
| Trifolium medium | Accepted | Trifolium medium | 3 | |
| Trifolium medium subsp. banaticum | Synonym | Trifolium sarosiense | 1 | |
| Trifolium montanum | Accepted | Trifolium montanum | 1 | |
| Trifolium montanum | Accepted | Trifolium montanum | 1 | |
| Trifolium montanum subsp. gayanum | Synonym | Trifolium montanum var. gayanum | 1 | |
| Trifolium nigrescens | Accepted | Trifolium nigrescens | 1 | |
| Trifolium noricum | Accepted | Trifolium noricum | 1 | |
| Trifolium ochroleucon | Accepted | Trifolium ochroleucon | 1 | |
| Trifolium pallescens | Accepted | Trifolium pallescens | 1 | |
| Trifolium pannonicum | Accepted | Trifolium pannonicum | 1 | |
| Trifolium patens | Accepted | Trifolium patens | 1 | |
| Trifolium pratense | Accepted | Trifolium pratense | 2 | |
| Trifolium pratense | Accepted | Trifolium pratense | 1 | |
| Trifolium pratense subsp. nivale | Synonym | Trifolium pratense subsp. pratense | 1 | |
| Trifolium repens | Accepted | Trifolium repens | 3 | |
| Trifolium repens subsp. prostratum | Accepted | Trifolium repens subsp. prostratum | 1 | |
| Trifolium resupinatum | Accepted | Trifolium resupinatum | 2 | |
| Trifolium rubens | Accepted | Trifolium rubens | 1 | |
| Trifolium saxatile | Accepted | Trifolium saxatile | 1 | |
| Trifolium scabrum | Accepted | Trifolium scabrum | 1 | |
| Trifolium scabrum subsp. lucanicum | Synonym | Trifolium lucanicum | 1 | |
| Trifolium spadiceum | Accepted | Trifolium spadiceum | 2 | |
| Trifolium stellatum | Accepted | Trifolium stellatum | 1 | |
| Trifolium striatum | Accepted | Trifolium striatum | 1 | |
| Trifolium strictum | Accepted | Trifolium strictum | 1 | |
| Trifolium subterraneum | Accepted | Trifolium subterraneum | 1 | |
| Trifolium suffocatum | Accepted | Trifolium suffocatum | 1 | |
| Trifolium thalii | Accepted | Trifolium thalii | 1 | |
| Trifolium tomentosum | Accepted | Trifolium tomentosum | 1 | |
| Triglochin maritima | Accepted | Triglochin maritima | 1 | |
| Triglochin palustris | Accepted | Triglochin palustris | 2 | |
| Trigonella caerulea | Accepted | Trigonella caerulea | 1 | |
| Trigonella corniculata | Accepted | Trigonella corniculata | 1 | |
| Trigonella foenum-graecum | Accepted | Trigonella foenum-graecum | 1 | |
| Trigonella gladiata | Accepted | Trigonella gladiata | 1 | |
| Trigonella monspeliaca | Synonym | Medicago monspeliaca | 1 | |
| Trigonia villosa | Accepted | Trigonia villosa | 1 | |
| Trimenia neocaledonica | Accepted | Trimenia neocaledonica | 1 | |
| Trinia glauca | Accepted | Trinia glauca | 1 | |
| Trinia glauca subsp. carniolica | Accepted | Trinia glauca subsp. carniolica | 1 | |
| Tripleurospermum inodorum | Accepted | Tripleurospermum inodorum | 2 | |
| Tripleurospermum maritimum | Accepted | Tripleurospermum maritimum | 2 | |
| Tripleurospermum maritimum subsp. phaeocephalum | Unchecked | 1 | ||
| Tripleurospermum maritimum subsp. subpolare | Synonym | Tripleurospermum subpolare | 1 | |
| Trisetum alpestre | Accepted | Trisetum alpestre | 1 | |
| Trisetum argenteum | Accepted | Trisetum argenteum | 1 | |
| Trisetum cavanillesii | Synonym | Trisetaria loeflingiana | 1 | |
| Trisetum cernuum | Accepted | Trisetum cernuum | 1 | |
| Trisetum distichophyllum | Accepted | Trisetum distichophyllum | 1 | |
| Trisetum flavescens subsp. flavescens | Accepted | Trisetum flavescens subsp. flavescens | 1 | |
| Trisetum flavescens subsp. purpurascens | Synonym | Trisetum flavescens | 1 | |
| Trisetum fuscum | Accepted | Trisetum fuscum | 1 | |
| Trisetum spicatum | Accepted | Trisetum spicatum | 1 | |
| Trisetum spicatum | Accepted | Trisetum spicatum | 1 | |
| Trisetum subalpestre | Accepted | Trisetum subalpestre | 1 | |
| Tristachya humbertii | Accepted | Tristachya humbertii | 1 | |
| Triticum aestivum | Accepted | Triticum aestivum | 1 | |
| Trochiscanthes nodiflorus | Accepted | Trochiscanthes nodiflorus | 1 | |
| Trollius asiaticus | Accepted | Trollius asiaticus | 1 | |
| Trollius europaeus | Accepted | Trollius europaeus | 3 | |
| Trollius europaeus subsp. transsilvanicus | Unchecked | 1 | ||
| Trymatococcus oligandrus | Accepted | Trymatococcus oligandrus | 1 | |
| Tuberaria guttata | Accepted | Tuberaria guttata | 1 | |
| Tulipa gesneriana | Accepted | Tulipa gesneriana | 3 | |
| Tulipa hungarica subsp. undulatifolia | Synonym | Tulipa hungarica | 1 | |
| Tulipa mauriana | Synonym | Tulipa gesneriana | 1 | |
| Tulipa montisandrei | Synonym | Tulipa gesneriana | 1 | |
| Tulipa planifolia | Synonym | Tulipa gesneriana | 1 | |
| Tulipa raddii | Synonym | Tulipa agenensis | 1 | |
| Tulipa rubidusa | Synonym | Tulipa gesneriana | 1 | |
| Tulipa sylvestris | Accepted | Tulipa sylvestris | 1 | |
| Tulipa sylvestris | Accepted | Tulipa sylvestris | 1 | |
| Tulipa sylvestris subsp. australis | Accepted | Tulipa sylvestris subsp. australis | 1 | |
| Turgenia latifolia | Accepted | Turgenia latifolia | 1 | |
| Turnera subulata | Accepted | Turnera subulata | 1 | |
| Turritis glabra | Accepted | Turritis glabra | 2 | |
| Tussilago farfara | Accepted | Tussilago farfara | 2 | |
| Typha angustifolia | Accepted | Typha angustifolia | 1 | |
| Typha domingensis | Accepted | Typha domingensis | 1 | |
| Typha latifolia | Accepted | Typha latifolia | 2 | |
| Typha laxmannii | Accepted | Typha laxmannii | 1 | |
| Typha minima | Accepted | Typha minima | 1 | |
| Typha shuttleworthii | Accepted | Typha shuttleworthii | 1 | |
| Tyrimnus leucographus | Accepted | Tyrimnus leucographus | 1 | |
| Ulex europaeus | Accepted | Ulex europaeus | 1 | |
| Ulex parviflorus | Accepted | Ulex parviflorus | 1 | |
| Ulmus glabra | Accepted | Ulmus glabra | 2 | |
| Ulmus laevis | Accepted | Ulmus laevis | 1 | |
| Ulmus minor | Accepted | Ulmus minor | 1 | |
| Ulmus minor | Accepted | Ulmus minor | 1 | |
| Umbilicus rupestris | Accepted | Umbilicus rupestris | 1 | |
| Unonopsis rufescens | Accepted | Unonopsis rufescens | 1 | |
| Urospermum dalechampii | Accepted | Urospermum dalechampii | 1 | |
| Urospermum picroides | Accepted | Urospermum picroides | 1 | |
| Urtica dioica | Accepted | Urtica dioica | 1 | |
| Urtica dioica | Accepted | Urtica dioica | 2 | |
| Urtica dioica var. holosericea | Synonym | Urtica dioica subsp. holosericea | 1 | |
| Urtica sondenii | Synonym | Urtica dioica subsp. sondenii | 1 | |
| Urtica urens | Accepted | Urtica urens | 2 | |
| Utricularia australis | Accepted | Utricularia australis | 2 | |
| Utricularia bremii | Accepted | Utricularia bremii | 1 | |
| Utricularia intermedia | Accepted | Utricularia intermedia | 1 | |
| Utricularia minor | Accepted | Utricularia minor | 2 | |
| Utricularia ochroleuca | Accepted | Utricularia ochroleuca | 1 | |
| Utricularia stygia | Accepted | Utricularia stygia | 1 | |
| Utricularia vulgaris | Accepted | Utricularia vulgaris | 2 | |
| Vaccaria hispanica | Accepted | Vaccaria hispanica | 1 | |
| Vaccinium gaultherioides | Synonym | Vaccinium uliginosum | 1 | |
| Vaccinium microcarpum | Accepted | Vaccinium microcarpum | 1 | |
| Vaccinium myrtillus | Accepted | Vaccinium myrtillus | 3 | |
| Vaccinium oxycoccos | Accepted | Vaccinium oxycoccos | 1 | |
| Vaccinium uliginosum | Accepted | Vaccinium uliginosum | 14 | |
| Vaccinium uliginosum subsp. microphyllum | Accepted | Vaccinium uliginosum subsp. microphyllum | 1 | |
| Vaccinium uliginosum subsp. uliginosum | Synonym | Vaccinium uliginosum | 1 | |
| Vaccinium vitis-idaea | Accepted | Vaccinium vitis-idaea | 3 | |
| Vaccinium vitis-idaea subsp. minus | Unchecked | 1 | ||
| Vahlia geminiflora | Accepted | Vahlia geminiflora | 1 | |
| Vahlodea atropurpurea | Accepted | Vahlodea atropurpurea | 1 | |
| Valantia muralis | Accepted | Valantia muralis | 1 | |
| Valeriana celtica | Accepted | Valeriana celtica | 1 | |
| Valeriana celtica subsp. norica | Synonym | Valeriana celtica | 1 | |
| Valeriana dioica | Accepted | Valeriana dioica | 1 | |
| Valeriana elongata | Accepted | Valeriana elongata | 1 | |
| Valeriana montana | Accepted | Valeriana montana | 1 | |
| Valeriana officinalis | Accepted | Valeriana officinalis | 1 | |
| Valeriana pyrenaica | Accepted | Valeriana pyrenaica | 1 | |
| Valeriana repens | Synonym | Valeriana excelsa | 1 | |
| Valeriana rotundifolia | Unchecked | 1 | ||
| Valeriana saliunca | Accepted | Valeriana saliunca | 1 | |
| Valeriana sambucifolia | Synonym | Valeriana excelsa subsp. sambucifolia | 3 | |
| Valeriana saxatilis | Accepted | Valeriana saxatilis | 1 | |
| Valeriana sitchensis | Accepted | Valeriana sitchensis | 1 | |
| Valeriana supina | Accepted | Valeriana supina | 1 | |
| Valeriana tripteris | Accepted | Valeriana tripteris | 2 | |
| Valeriana tuberosa | Accepted | Valeriana tuberosa | 1 | |
| Valeriana wallrothii | Synonym | Valeriana stolonifera subsp. angustifolia | 1 | |
| Valerianella carinata | Synonym | Valeriana carinata | 1 | |
| Valerianella coronata | Accepted | Valerianella coronata | 1 | |
| Valerianella dentata | Synonym | Valeriana dentata | 1 | |
| Valerianella discoidea | Synonym | Valeriana discoidea | 1 | |
| Valerianella echinata | Synonym | Valeriana echinata | 1 | |
| Valerianella eriocarpa | Synonym | Valeriana eriocarpa | 1 | |
| Valerianella locusta | Synonym | Valeriana locusta | 1 | |
| Valerianella rimosa | Synonym | Valeriana rimosa | 1 | |
| Vallisneria spiralis | Accepted | Vallisneria spiralis | 1 | |
| Vantanea parviflora | Accepted | Vantanea parviflora | 1 | |
| Vatairea erythrocarpa | Accepted | Vatairea erythrocarpa | 1 | |
| Vataireopsis surinamensis | Accepted | Vataireopsis surinamensis | 1 | |
| Velezia rigida | Synonym | Dianthus nudiflorus | 1 | |
| Ventenata dubia | Accepted | Ventenata dubia | 1 | |
| Veratrum album | Accepted | Veratrum album | 1 | |
| Veratrum album subsp. album | Synonym | Veratrum album | 1 | |
| Veratrum album subsp. lobelianum | Synonym | Veratrum lobelianum | 1 | |
| Veratrum nigrum | Accepted | Veratrum nigrum | 1 | |
| Veratrum viride var. eschscholtzianum | Accepted | Veratrum viride var. eschscholtzianum | 1 | |
| Verbascum alpinum | Unchecked | 1 | ||
| Verbascum blattaria | Accepted | Verbascum blattaria | 1 | |
| Verbascum boerhavii | Unchecked | 1 | ||
| Verbascum chaixii subsp. austriacum | Accepted | Verbascum chaixii subsp. austriacum | 1 | |
| Verbascum chaixii subsp. chaixii | Synonym | Verbascum chaixii | 1 | |
| Verbascum densiflorum | Accepted | Verbascum densiflorum | 1 | |
| Verbascum glabratum | Accepted | Verbascum glabratum | 1 | |
| Verbascum lychnitis | Accepted | Verbascum lychnitis | 1 | |
| Verbascum nigrum | Accepted | Verbascum nigrum | 1 | |
| Verbascum phlomoides | Accepted | Verbascum phlomoides | 1 | |
| Verbascum phoeniceum | Accepted | Verbascum phoeniceum | 1 | |
| Verbascum pulverulentum | Accepted | Verbascum pulverulentum | 1 | |
| Verbascum sinuatum | Accepted | Verbascum sinuatum | 1 | |
| Verbascum speciosum | Accepted | Verbascum speciosum | 1 | |
| Verbascum thapsus | Accepted | Verbascum thapsus | 1 | |
| Verbascum thapsus subsp. montanum | Unchecked | 1 | ||
| Verbena officinalis | Accepted | Verbena officinalis | 1 | |
| Veronica acinifolia | Accepted | Veronica acinifolia | 1 | |
| Veronica agrestis | Accepted | Veronica agrestis | 1 | |
| Veronica allionii | Accepted | Veronica allionii | 1 | |
| Veronica alpina | Accepted | Veronica alpina | 4 | |
| Veronica anagallis-aquatica | Accepted | Veronica anagallis-aquatica | 2 | |
| Veronica anagalloides | Accepted | Veronica anagalloides | 1 | |
| Veronica aphylla | Accepted | Veronica aphylla | 1 | |
| Veronica arvensis | Accepted | Veronica arvensis | 2 | |
| Veronica austriaca | Accepted | Veronica austriaca | 1 | |
| Veronica bachofenii | Accepted | Veronica bachofenii | 1 | |
| Veronica baumgartenii | Accepted | Veronica baumgartenii | 1 | |
| Veronica beccabunga | Accepted | Veronica beccabunga | 2 | |
| Veronica bellidioides | Accepted | Veronica bellidioides | 1 | |
| Veronica catenata | Accepted | Veronica catenata | 2 | |
| Veronica chamaedrys | Accepted | Veronica chamaedrys | 1 | |
| Veronica chamaedrys | Accepted | Veronica chamaedrys | 1 | |
| Veronica chamaedrys subsp. chamaedrys | Synonym | Veronica chamaedrys | 1 | |
| Veronica crassifolia | Unchecked | 1 | ||
| Veronica crinita | Accepted | Veronica crinita | 1 | |
| Veronica cymbalaria | Accepted | Veronica cymbalaria | 1 | |
| Veronica dillenii | Accepted | Veronica dillenii | 1 | |
| Veronica filiformis | Accepted | Veronica filiformis | 2 | |
| Veronica fruticans | Accepted | Veronica fruticans | 3 | |
| Veronica fruticulosa | Accepted | Veronica fruticulosa | 1 | |
| Veronica gentianoides | Accepted | Veronica gentianoides | 1 | |
| Veronica hederifolia subsp. hederifolia | Unchecked | 1 | ||
| Veronica hederifolia subsp. lucorum | Synonym | Veronica sublobata | 1 | |
| Veronica hederifolia subsp. triloba | Unchecked | 1 | ||
| Veronica jacquinii | Synonym | Veronica austriaca subsp. jacquinii | 1 | |
| Veronica longifolia | Accepted | Veronica longifolia | 1 | |
| Veronica montana | Accepted | Veronica montana | 2 | |
| Veronica officinalis | Accepted | Veronica officinalis | 3 | |
| Veronica orsiniana | Accepted | Veronica orsiniana | 1 | |
| Veronica peregrina | Accepted | Veronica peregrina | 1 | |
| Veronica persica | Accepted | Veronica persica | 1 | |
| Veronica polita | Accepted | Veronica polita | 1 | |
| Veronica praecox | Accepted | Veronica praecox | 1 | |
| Veronica prostrata | Accepted | Veronica prostrata | 1 | |
| Veronica prostrata subsp. prostrata | Unchecked | 1 | ||
| Veronica scardica | Accepted | Veronica scardica | 1 | |
| Veronica scutellata | Accepted | Veronica scutellata | 2 | |
| Veronica serpyllifolia | Accepted | Veronica serpyllifolia | 2 | |
| Veronica serpyllifolia subsp. humifusa | Unchecked | 1 | ||
| Veronica serpyllifolia subsp. humifusa | Unchecked | 1 | ||
| Veronica serpyllifolia subsp. serpyllifolia | Synonym | Veronica serpyllifolia | 2 | |
| Veronica spicata | Accepted | Veronica spicata | 1 | |
| Veronica spicata subsp. barrelieri | Synonym | Veronica barrelieri | 1 | |
| Veronica teucrium | Accepted | Veronica teucrium | 1 | |
| Veronica triphyllos | Accepted | Veronica triphyllos | 1 | |
| Veronica urticifolia | Accepted | Veronica urticifolia | 1 | |
| Veronica verna | Accepted | Veronica verna | 2 | |
| Viburnum lantana | Accepted | Viburnum lantana | 1 | |
| Viburnum opulus | Accepted | Viburnum opulus | 1 | |
| Viburnum tinus | Accepted | Viburnum tinus | 1 | |
| Vicia bithynica | Accepted | Vicia bithynica | 1 | |
| Vicia cracca | Accepted | Vicia cracca | 2 | |
| Vicia cracca subsp. cracca | Synonym | Vicia cracca | 1 | |
| Vicia cracca subsp. incana | Synonym | Vicia incana | 2 | |
| Vicia cracca subsp. tenuifolia | Synonym | Vicia tenuifolia | 1 | |
| Vicia cusnae | Accepted | Vicia cusnae | 1 | |
| Vicia dumetorum | Accepted | Vicia dumetorum | 2 | |
| Vicia grandiflora | Accepted | Vicia grandiflora | 1 | |
| Vicia hirsuta | Accepted | Vicia hirsuta | 2 | |
| Vicia hybrida | Accepted | Vicia hybrida | 1 | |
| Vicia johannis | Accepted | Vicia johannis | 1 | |
| Vicia lathyroides | Accepted | Vicia lathyroides | 2 | |
| Vicia loiseleurii | Accepted | Vicia loiseleurii | 1 | |
| Vicia lutea | Accepted | Vicia lutea | 1 | |
| Vicia melanops | Accepted | Vicia melanops | 1 | |
| Vicia narbonensis | Accepted | Vicia narbonensis | 1 | |
| Vicia onobrychioides | Accepted | Vicia onobrychioides | 1 | |
| Vicia oroboides | Accepted | Vicia oroboides | 1 | |
| Vicia orobus | Accepted | Vicia orobus | 1 | |
| Vicia pannonica | Accepted | Vicia pannonica | 1 | |
| Vicia parviflora | Accepted | Vicia parviflora | 1 | |
| Vicia peregrina | Accepted | Vicia peregrina | 1 | |
| Vicia pisiformis | Accepted | Vicia pisiformis | 2 | |
| Vicia pyrenaica | Accepted | Vicia pyrenaica | 1 | |
| Vicia sallei | Synonym | Vicia sativa subsp. nigra | 1 | |
| Vicia sativa | Accepted | Vicia sativa | 1 | |
| Vicia sativa | Accepted | Vicia sativa | 1 | |
| Vicia sativa subsp. cordata | Accepted | Vicia sativa subsp. cordata | 1 | |
| Vicia sativa subsp. nigra | Accepted | Vicia sativa subsp. nigra | 1 | |
| Vicia sepium | Accepted | Vicia sepium | 4 | |
| Vicia serratifolia | Accepted | Vicia serratifolia | 1 | |
| Vicia sylvatica | Accepted | Vicia sylvatica | 2 | |
| Vicia tenuifolia | Accepted | Vicia tenuifolia | 1 | |
| Vicia tenuifolia subsp. dalmatica | Synonym | Vicia dalmatica | 1 | |
| Vicia tetrasperma | Accepted | Vicia tetrasperma | 2 | |
| Vicia villosa | Accepted | Vicia villosa | 1 | |
| Vicia villosa | Accepted | Vicia villosa | 1 | |
| Vicia villosa subsp. varia | Accepted | Vicia villosa subsp. varia | 1 | |
| Viguierella madagascariensis | Accepted | Viguierella madagascariensis | 1 | |
| Vinca major | Accepted | Vinca major | 1 | |
| Vinca minor | Accepted | Vinca minor | 1 | |
| Vincetoxicum hirundinaria | Accepted | Vincetoxicum hirundinaria | 2 | |
| Vincetoxicum nigrum | Accepted | Vincetoxicum nigrum | 1 | |
| Vincetoxicum rossicum | Accepted | Vincetoxicum rossicum | 1 | |
| Viola alba | Accepted | Viola alba | 1 | |
| Viola alba subsp. scotophylla | Accepted | Viola alba subsp. scotophylla | 1 | |
| Viola alpina | Accepted | Viola alpina | 1 | |
| Viola argenteria | Unchecked | 1 | ||
| Viola arvensis | Accepted | Viola arvensis | 2 | |
| Viola biflora | Accepted | Viola biflora | 3 | |
| Viola calcarata | Accepted | Viola calcarata | 1 | |
| Viola calcarata subsp. cavillieri | Unchecked | 1 | ||
| Viola calcarata subsp. villarsiana | Accepted | Viola calcarata subsp. villarsiana | 1 | |
| Viola canina | Accepted | Viola canina | 4 | |
| Viola canina subsp. montana | Accepted | Viola canina subsp. montana | 1 | |
| Viola cenisia | Accepted | Viola cenisia | 1 | |
| Viola collina | Accepted | Viola collina | 1 | |
| Viola comollia | Accepted | Viola comollia | 1 | |
| Viola cornuta | Accepted | Viola cornuta | 1 | |
| Viola cucullata | Accepted | Viola cucullata | 1 | |
| Viola dacica | Accepted | Viola dacica | 1 | |
| Viola declinata | Accepted | Viola declinata | 1 | |
| Viola dubyana | Accepted | Viola dubyana | 1 | |
| Viola elatior | Accepted | Viola elatior | 1 | |
| Viola epipsila | Accepted | Viola epipsila | 2 | |
| Viola hirta | Accepted | Viola hirta | 2 | |
| Viola jooi | Accepted | Viola jooi | 1 | |
| Viola jordanii | Accepted | Viola jordanii | 1 | |
| Viola kitaibeliana | Accepted | Viola kitaibeliana | 1 | |
| Viola laricicola | Accepted | Viola laricicola | 1 | |
| Viola lutea | Accepted | Viola lutea | 1 | |
| Viola lutea subsp. sudetica | Accepted | Viola lutea subsp. sudetica | 1 | |
| Viola mirabilis | Accepted | Viola mirabilis | 2 | |
| Viola odorata | Accepted | Viola odorata | 1 | |
| Viola palustris | Accepted | Viola palustris | 3 | |
| Viola persicifolia | Synonym | Viola elatior | 1 | |
| Viola persicifolia | Synonym | Viola elatior | 1 | |
| Viola pinnata | Accepted | Viola pinnata | 1 | |
| Viola pumila | Accepted | Viola pumila | 2 | |
| Viola pyrenaica | Accepted | Viola pyrenaica | 1 | |
| Viola reichenbachiana | Accepted | Viola reichenbachiana | 2 | |
| Viola riviniana | Accepted | Viola riviniana | 3 | |
| Viola rupestris | Accepted | Viola rupestris | 2 | |
| Viola saxatilis | Synonym | Viola tricolor subsp. subalpina | 1 | |
| Viola selkirkii | Accepted | Viola selkirkii | 1 | |
| Viola suavis | Accepted | Viola suavis | 1 | |
| Viola thomasiana | Accepted | Viola thomasiana | 1 | |
| Viola tricolor | Accepted | Viola tricolor | 2 | |
| Viola uliginosa | Accepted | Viola uliginosa | 1 | |
| Viola valderia | Accepted | Viola valderia | 1 | |
| Viscaria alpina | Synonym | Silene suecica | 2 | |
| Viscum album | Accepted | Viscum album | 1 | |
| Viscum album subsp. abietis | Accepted | Viscum album subsp. abietis | 1 | |
| Viscum album subsp. austriacum | Accepted | Viscum album subsp. austriacum | 1 | |
| Vitaliana primuliflora | Synonym | Androsace vitaliana | 1 | |
| Vitaliana primuliflora | Synonym | Androsace vitaliana | 1 | |
| Vitis sylvestris | Synonym | Vitis vinifera | 1 | |
| Vochysia guianensis | Accepted | Vochysia guianensis | 2 | |
| Vochysia neyratii | Accepted | Vochysia neyratii | 1 | |
| Vochysia sabatieri | Accepted | Vochysia sabatieri | 1 | |
| Vochysia tomentosa | Accepted | Vochysia tomentosa | 1 | |
| Vochysia tucanorum | Accepted | Vochysia tucanorum | 1 | |
| Vochysia vismiifolia | Accepted | Vochysia vismiifolia | 1 | |
| Vouacapoua americana | Accepted | Vouacapoua americana | 1 | |
| Vouarana guianensis | Accepted | Vouarana guianensis | 1 | |
| Voyria caerulea | Accepted | Voyria caerulea | 1 | |
| Voyria corymbosa | Accepted | Voyria corymbosa | 1 | |
| Voyria rosea | Accepted | Voyria rosea | 1 | |
| Vulpia bromoides | Accepted | Vulpia bromoides | 1 | |
| Vulpia ciliata | Accepted | Vulpia ciliata | 1 | |
| Vulpia membranacea | Accepted | Vulpia membranacea | 1 | |
| Vulpia myuros | Accepted | Vulpia myuros | 1 | |
| Vulpia unilateralis | Accepted | Vulpia unilateralis | 1 | |
| Wahlenbergia hederacea | Synonym | Hesperocodon hederaceus | 1 | |
| Waldsteinia geoides | Accepted | Waldsteinia geoides | 1 | |
| Waldsteinia ternata | Accepted | Waldsteinia ternata | 1 | |
| Weinmannia biviniana | Synonym | Weinmannia mauritiana | 1 | |
| Wilhelmsia physodes | Accepted | Wilhelmsia physodes | 1 | |
| Willemetia stipitata | Accepted | Willemetia stipitata | 1 | |
| Wisteria sinensis | Accepted | Wisteria sinensis | 1 | |
| Woodsia alpina | Accepted | Woodsia alpina | 2 | |
| Woodsia glabella | Accepted | Woodsia glabella | 1 | |
| Woodsia ilvensis | Accepted | Woodsia ilvensis | 2 | |
| Woodsia pulchella | Accepted | Woodsia pulchella | 1 | |
| Wulfenia carinthiaca | Accepted | Wulfenia carinthiaca | 1 | |
| Xanthium italicum | Synonym | Xanthium strumarium subsp. strumarium | 1 | |
| Xanthium orientale | Unchecked | 1 | ||
| Xanthium spinosum | Accepted | Xanthium spinosum | 1 | |
| Xanthium strumarium | Accepted | Xanthium strumarium | 2 | |
| Xanthoselinum alsaticum subsp. venetum | Unchecked | 1 | ||
| Xatardia scabra | Accepted | Xatardia scabra | 1 | |
| Xeranthemum annuum | Accepted | Xeranthemum annuum | 1 | |
| Xeranthemum cylindraceum | Accepted | Xeranthemum cylindraceum | 1 | |
| Xeranthemum inapertum | Accepted | Xeranthemum inapertum | 1 | |
| Xeronema moorei | Accepted | Xeronema moorei | 1 | |
| Xylosma benthamii | Accepted | Xylosma benthamii | 1 | |
| Xyris anceps | Accepted | Xyris anceps | 1 | |
| Yvesia madagascariensis | Accepted | Yvesia madagascariensis | 1 | |
| Zannichellia palustris | Accepted | Zannichellia palustris | 3 | |
| Zanthoxylum caribaeum | Accepted | Zanthoxylum caribaeum | 1 | |
| Zanthoxylum fagara | Accepted | Zanthoxylum fagara | 1 | |
| Zanthoxylum rhoifolium | Accepted | Zanthoxylum rhoifolium | 1 | |
| Zanthoxylum riedelianum | Accepted | Zanthoxylum riedelianum | 1 | |
| Ziziphora capitata | Accepted | Ziziphora capitata | 1 | |
| Zygia tetragona | Accepted | Zygia tetragona | 1 |