#lichen  any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
  supertype:  fungus  a parasitic plant lacking chlorophyll and leaves and true stems and roots and reproducing by spores
  member of:  division_Lichenes
  subtype:  ascolichen  a lichen in which the fungus component is an ascomycete
  subtype:  basidiolichen  a lichen in which the fungus component is a basidiomycete
  subtype:  lecanora  any lichen of the genus Lecanora; some used in dyeing; some used for food
     subtype:  manna_lichen__mannalichen  any of several Old World semi-crustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals
     subtype:  archil__orchil  any of various lecanoras that yield the dye archil
  subtype:  roccella__Roccella_tinctoria  a source of the dye archil and of litmus
  subtype:  beard_lichen__beardlichen__beard_moss__Usnea_barbata  greenish gray pendulous lichen growing on trees
  subtype:  horsehair_lichen__horsehairlichen__horsetail_lichen__horsetaillichen  any of several lichens of the genus Alectoria having a thallus consisting of filaments resembling hair
  subtype:  reindeer_moss__reindeer_lichen__arctic_moss__Cladonia_rangiferina  an erect grayish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans
  subtype:  crottle__crottal__crotal  any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made
  subtype:  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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