List of Betula species

Bark on twigs rich in methyl salicylate (oil of wintergreen). Female catkins erect. • Diploid (2n = 28). • Betula lenta - Sweet birch or cherry birch • Betula lenta subsp. uber - Cherry Creek birch • Hexaploid (6n = 84). • Betula allegheniensis - Yellow birch (B. lutea) • Decaploid (10n = 140). • Betula austrosinensis - South China birch • Betula globispica - • Betula medwediewii - Caucasian birch • Duodecaploid (12n = 168). • Betula megrelica - • chromosome number not reported • Betula corylifolia - Hazel-leaf birch • Betula grossa - Japanese cherry birch • Betula insignis - ==Subgenus Betulaster - Large-leaf birches==

Bark on twigs contains some methyl salicylate. Female catkins pendulous. • Betula alnoides - Alder-leaf birch • Betula alnoides subsp. luminifera - • Betula maximowicziana - Monarch birch ==Subgenus Neurobetula - Costate birches==

Bark on twigs without methyl salicylate. Female catkins erect. • Diploid (2n = 28). • Betula calcicola - • Betula chichibuensis - • Betula costata - Korean birch • Betula nigra - River birch or black birch • Betula potaninii - Potanin's birch • Tetraploid (4n = 56). • Betula albosinensis - Chinese red birch • Betula albosinensis var. septentrionalis - North Chinese red birch • Betula ermanii - Erman's birch • Betula jacquemontii (B. utilis subsp. jacquemontii) - White-barked Himalayan birch • Betula utilis - Himalayan birch • Hexaploid (6n = 84). • Betula dahurica - Dahurian birch • Betula delavayi - Delavay's birch • Betula raddeana - Radde's birch • Octoploid (8n = 112). • Betula chinensis - Chinese birch • chromosome number not reported • Betula fargesii - Farges's birch • Betula schmidtii - Schmidt's birch • chromosome number unknown • Betula leopoldae ==Subgenus Betula - Typical birches==

Bark on twigs without methyl salicylate. Female catkins pendulous. • Diploid (2n = 28). • Betula cordifolia - Heart-leaf birch or mountain paper birch • Betula pendula - Silver birch • Betula mandschurica - Manchurian birch • Betula mandschurica var. japonica - Japanese birch • Betula neoalaskana - Alaska birch or Yukon birch • Betula occidentalis - Water birch or red birch (B. fontinalis) • Betula platyphylla (Betula pendula var. platyphylla) - Siberian silver birch • Betula populifolia - Gray birch • Betula szechuanica (Betula pendula var. szechuanica) - Sichuan birch • Tetraploid (4n = 56). • Betula celtiberica - Iberian white birch • Betula pubescens - White birch, European white birch or downy birch • Betula pubescens subsp. tortuosa - Arctic white birch • Pentaploid (5n = 70). • Betula kenaica - Kenai birch • Hexaploid (6n = 84). • Betula papyrifera - Paper birch, canoe birch or American white birch (sometimes tetraploid or pentaploid) ==Subgenus Chamaebetula - Dwarf birches==

Small shrubs with small rounded leaves. Female catkins pendulous. • Diploid (2n = 28). • Betula glandulosa (B. nana subsp. glandulosa) - American dwarf birch • Betula nana - Dwarf birch • Tetraploid (4n = 56). • Betula minor - Quebec dwarf birch • Betula pumila - Swamp birch • chromosome number not reported • Betula fruticosa - • Betula gmelinii - • Betula hallii - Cascades dwarf birch • Betula humilis - Arctic dwarf birch • Betula michauxii - Newfoundland dwarf birch • Betula microphylla - • Betula middendorffii - ==Notes==