#genus_Alnus__Alnus  alders
  supertype:  hamamelid_dicot_genus__hamameliddicotgenu  genus of mostly woody relatively primitive dicotyledonous flowering plants with flowers often unisexual and often borne in catkins
  member of:  family_Betulaceae
  member:  alder_tree__aldertree__alder  north temperate shrubs or trees having toothed leaves and conelike fruit; bark is used in tanning and dyeing and the rot-resistant wood
  member:  common_alder__European_black_alder__Alnus_glutinosa__Alnus_vulgaris  medium-sized tree with brown-black bark and woody fruiting catkins; leaves are hairy beneath
  member:  gray_alder__Alnus_incana  native to Europe but introduced in America
  member:  seaside_alder__seasidealder__Alnus_maritima  shrub or small tree of southeastern United States having soft light brown wood
  member:  white_alder__whitealder__mountain_alder__Alnus_rhombifolia  tree of western United States
  member:  red_alder__redalder__Oregon_alder__Alnus_rubra  large tree of Pacific coast of North America having hard red wood much used for furniture
  member:  speckled_alder__Alnus_rugosa  common shrub of Canada and northeastern United States having shoots scattered with rust-colored down
  member:  smooth_alder__hazel_alder__hazelalder__Alnus_serrulata  common shrub of the eastern United States with smooth bark
  member:  Alnus_veridis__green_alder__greenalder  shrub of mountainous areas of Europe
  member:  green_alder__greenalder__Alnus_veridis_crispa__Alnus_crispa  North American shrub with light green leaves and winged nuts

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