#bark  tough protective covering of the woody stems and roots of trees and other woody plants
  supertype:  #natural_covering__naturalcovering__covering__cover  a natural object that covers or envelops; "the fox was flushed from its cover"
  subtype:  #cinnamon_bark.bark  #cassia_bark  #cinnamon_bark  #magnolia.bark  #tanbark  #mezereum  #canella_bark  #cinchona_bark  #cascarilla_bark  #cascara_sagrada  #winter's_bark  #tappa  #angostura_bark  #cork  #phellem
  part of:  #root  the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground
     part of:  #root_system__rootage  a developed system of roots
  part of:  #branch  a division of a stem, or secondary stem arising from the main stem of a plant
  part of:  #tree_trunk__trunk__bole  the main stem of a tree; usually covered with bark; the bole is usually the part that is commercially useful for lumber
     part of:  #tree  a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms

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