Supriya Ghosh (Editor)

List of Betula species

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Subgenera of genus Betula (Birch), are;

Contents

Subgenus Betulenta - Wintergreen oil birches

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 insignis -
  • 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 maximowiczii - Monarch Birch

    • Subgenus Neurobetula - Costate birches

    Bark on twigs without methyl salicylate. Female catkins erect.

  • Diploid (2n = 28).
  • Betula calcicola -
  • Betula chichibuenis -
  • 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 hallii - Cascades Dwarf Birch
  • Betula humilis - Arctic Dwarf Birch
  • Betula michauxii - Newfoundland Dwarf Birch
  • Betula microphylla -
  • Betula middendorffii -

    • References

    List of Betula species Wikipedia
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