#genus_Cetraria__Cetraria  foliose lichens chiefly of northern latitudes
  supertype:  fungus_genus  includes lichen genera
  member of:  family_Parmeliaceae
  member:  Iceland_moss__Iceland_lichen__Cetraria_islandica  lichen with branched flattened partly erect thallus that grows in mountainous and arctic regions; used as a medicine or food for humans and livestock; a source of glycerol

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