#birch_tree__birchtree__birch  any betulaceous tree or shrub of the genus Betula having a thin peeling bark
  supertype:  tree  a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
  substance:  birch
  member of:  genus_Betula
  subtype:  yellow_birch__Betula_alleghaniensis__Betula_leutea  tree of eastern North America with thin lustrous yellow or gray bark
  subtype:  American_white_birch__paper_birch__paperbirch__canoe_birch__canoebirch__Betula_cordifolia__Betula_papyrifera  small American birch with peeling white bark often worked into e.g. baskets or toy canoes
  subtype:  American_gray_birch__gray_birch__Betula_populifolia  medium-sized birch of eastern North America having white or pale gray bark and valueless wood; occurs often as a second-growth forest tree
  subtype:  silver_birch__common_birch__European_white_birch__Betula_pendula  European birch with silvery white peeling bark and markedly drooping branches
  subtype:  downy_birch__downybirch__white_birch__whitebirch__Betula_pubescens  European birch with dull white to pale brown bark and somewhat drooping hairy branches
  subtype:  black_birch__river_birch__red_birch__redbirch__Betula_nigra  birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
  subtype:  sweet_birch__cherry_birch__black_birch__Betula_lenta  common birch of the eastern United States having spicy brown bark yielding a volatile oil and hard dark wood used for furniture
  subtype:  Yukon_white_birch__Betula_neoalaskana  Alaskan birch with white to pale brown bark
  subtype:  swamp_birch__water_birch__mountain_birch__Western_paper_birch__Western_birch__Betula_fontinalis  birch of western United States resembling the paper birch but having brownish bark
  subtype:  Newfoundland_dwarf_birch__American_dwarf_birch__Betula_glandulosa  small shrub of colder parts of North America and Greenland

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