List of Betula species
Subgenera of genus Betula, are;
Subgenus ''Betulenta'' - Wintergreen oil birches
Bark on twigs rich in methyl salicylate. Female catkins erect.- Diploid.
- *Betula lenta - Sweet birch or cherry birch
- **Betula lenta subsp. uber - Cherry Creek birch
- Hexaploid.
- *Betula allegheniensis - Yellow birch
- Decaploid.
- *Betula austrosinensis - South China birch
- *Betula globispica -
- *Betula insignis -
- *Betula medwediewii - Caucasian birch
- Duodecaploid.
- *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.
- *Betula calcicola -
- *Betula chichibuensis -
- *Betula costata - Korean birch
- *Betula nigra - River birch or black birch
- *Betula potaninii - Potanin's birch
- Tetraploid.
- *Betula albosinensis - Chinese red birch
- **Betula albosinensis var. septentrionalis - North Chinese red birch
- *Betula ermanii - Erman's birch
- *Betula jacquemontii - White-barked Himalayan birch
- *Betula utilis - Himalayan birch
- Hexaploid.
- *Betula dahurica - Dahurian birch
- *Betula delavayi - Delavay's birch
- *Betula raddeana - Radde's birch
- Octoploid.
- *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.
- *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
- *Betula platyphylla - Siberian silver birch
- *Betula populifolia - Gray birch
- *Betula szechuanica - Sichuan birch
- Tetraploid.
- *Betula celtiberica - Iberian white birch
- *Betula pubescens - White birch, European white birch or downy birch
- **Betula pubescens subsp. tortuosa - Arctic white birch
- Pentaploid.
- *Betula kenaica - Kenai birch
- Hexaploid.
- *Betula papyrifera - Paper birch, canoe birch or American white birch
Subgenus ''Chamaebetula'' - Dwarf birches
Small shrubs with small rounded leaves. Female catkins pendulous.- Diploid.
- *Betula glandulosa - American dwarf birch
- *Betula nana - Dwarf birch
- Tetraploid.
- *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 -