| Betula ajanensis Komarov |
wfo-0000330343 |
| Betula alaskana Sarg. |
wfo-0000330364 |
| Betula alba subsp. mandshurica Regel |
wfo-0000330608 |
| Betula alba subsp. tauschii Regel |
wfo-0001214780 |
| Betula alba var. camtschatica Regel |
wfo-0000330418 |
| Betula alba var. humilis Regel |
wfo-0000330538 |
| Betula alba var. kamtschatica Regel |
wfo-0000330567 |
| Betula alba var. resinifera Regel |
wfo-0000330774 |
| Betula alba var. tauschii Regel |
wfo-0000330811 |
| Betula austrosichotensis V.N.Vassil. & V.I.Baranov |
wfo-0000331244 |
| Betula cajanderi subsp. minutifolia Kozhevn. |
wfo-0000331583 |
| Betula cajanderi Sukaczev |
wfo-0000331560 |
| Betula demetrii I.V.Vassil. |
wfo-0000332319 |
| Betula grandifolia Litv. |
wfo-0000333138 |
| Betula japonica var. camtschatica (Regel) H.J.P.Winkl. |
wfo-0000333714 |
| Betula japonica var. resinifera H.J.P.Winkl. |
wfo-0000333746 |
| Betula japonica var. tauschii (Regel) H.J.P.Winkl. |
wfo-0000333776 |
| Betula kamtschatica (Regel) C.-A.Jansson |
wfo-0000333823 |
| Betula latifolia var. cuneifolia Nakai |
wfo-0000804523 |
| Betula latifolia var. kamtschatica (Regel) Makino & Nemoto |
wfo-0000804541 |
| Betula mandshurica Nakai |
wfo-0000334363 |
| Betula mandshurica var. kamtschatica (Regel) Rehder |
wfo-0000334385 |
| Betula neoalaskana Sarg. |
wfo-0000334885 |
| Betula papyrifera subsp. humilis (Regel) A.E.Murray |
wfo-0000335270 |
| Betula papyrifera subsp. humilis (Regel) Hultén |
wfo-0001214741 |
| Betula papyrifera subsp. neoalaskana (Sarg.) A.E.Murray |
wfo-0000335337 |
| Betula papyrifera var. humilis (Regel ex DC.) Fernald & Raup |
wfo-0000335259 |
| Betula papyrifera var. neoalaskana Raup |
wfo-0000335326 |
| Betula pendula subsp. kamtschatica (Regel) Shemberg |
wfo-0000335524 |
| Betula pendula var. tauschii (Regel) Rehder |
wfo-0000804522 |
| Betula platyphylla subsp. kamtschatica (Regel) Vorosch. |
wfo-0000335692 |
| Betula platyphylla subsp. minutifolia (Kozhevn.) Kozhevn. |
wfo-0000335726 |
| Betula platyphylla subsp. platyphylla |
wfo-0000335748 |
| Betula platyphylla Sukaczev |
wfo-0000335660 |
| Betula platyphylla var. brunnea J.X.Huang |
wfo-0000335671 |
| Betula platyphylla var. kamtschatica (Regel) H.Hara |
wfo-0000335703 |
| Betula platyphylla var. phellodendroides S.L.Tung |
wfo-0000335737 |
| Betula platyphylla var. tauschii (Regel) Tatew. |
wfo-0000804528 |
| Betula resinifera Britton |
wfo-0000336568 |
| Betula tauschii Koidz. |
wfo-0000337205 |
| Betula tauschii var. kamtschatica (Regel) Koidz. |
wfo-0000804540 |
| Betula verrucosa var. platyphylla (Sukaczev) Lindq. |
wfo-0000909126 |