Taxonomy of Betula - Subgenus Neurobetula - Costate Birches

Costate Birches

Bark on twigs without methyl salicylate. Female catkins erect.

  • Diploid (2n = 28).
    • Betula calcicola -
    • Betula chichibuenis -
    • Betula costata -
    • 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 davurica - 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

Read more about this topic:  Taxonomy Of Betula, Subgenus Neurobetula

Famous quotes containing the word birches:

    “When I see birches bend to left and right
    Across the lines of straighter darker trees,
    I like to think some boy’s been swinging them.”
    —Robert Frost (1874–1963)