#woad  any of several herbs of the genus Isatis
  supertype:  herbaceous_plant__herb  a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
  member of:  genus_Isatis
  subtype:  dyer's_woad__Isatis_tinctoria  European biennial formerly grown for the blue coloring matter yielded by its leaves

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