#poplar_tree__poplar  any of numerous trees of north temperate regions having light soft wood and flowers borne in catkins
  supertype:  #angiospermous_tree__angiospermoustree__flowering_tree__floweringtree  any tree having seeds and ovules contained in the ovary
  substance:  #poplar
  member of:  #genus_Populus
  subtype:  #balsam_poplar__hackmatack__tacamahac__populusbalsamifera  poplar of northeastern North America with broad heart-shaped leaves
  subtype:  #white_poplar__whitepoplar__whiteaspen__abele__aspen_poplar__aspenpoplar__silver-leaved_poplar__Populus_alba  a poplar that is widely cultivated in the United States; has white bark and leaves with whitish undersurfaces
  subtype:  #gray_poplar__Populus_canescens  large rapidly growing poplar with faintly lobed dentate leaves gray on the lower surface; native to Europe but introduced and naturalized elsewhere
  subtype:  #black_poplar__blackpoplar__Populus_nigra  large European poplar
     subtype:  #Lombardy_poplar__lombardypoplar__Populus_nigra_italica  distinguished by its columnar fastigiate shape and erect branches
  subtype:  #cottonwood  any of several North American trees of the genus Populus having a tuft of cottony hairs on the seed
     subtype:  #Eastern_cottonwood__necklace_poplar__Populus_deltoides  a common poplar of eastern and central United States; cultivated in United States for its rapid growth and luxuriant foliage and in Europe for timber
     subtype:  #black_cottonwood__blackcottonwood__Western_balsam_poplar__Populus_trichocarpa  cottonwood of western North America with dark green leaves shining above and rusty or silvery beneath
     subtype:  #swamp_cottonwood__swampcottonwood__black_cottonwood__blackcottonwood__downy_poplar__downypoplar__swamp_poplar__swamppoplar__Populus_heterophylla  North American poplar with large rounded scalloped leaves and brownish bark and wood
  subtype:  #aspen  any of several trees of the genus Populus having leaves on flattened stalks so that they flutter in the lightest wind
     subtype:  #European_quaking_aspen__quaking_aspen__quakingaspen__Populus_tremula  Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa
     subtype:  #American_quaking_aspen__American_aspen__Populus_tremuloides  slender aspen native to North America
     subtype:  #Canadian_aspen__bigtooth_aspen__bigtoothed_aspen__big-toothed_aspen__bigtoothedaspen__large-toothed_aspen__largetoothedaspen__large_tooth_aspen__largetoothaspen__Populus_grandidentata  aspen with a narrow crown; eastern North America

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