#black_rockweed__blackrockweed__bladderwrack__bladder_fucus__bladderfucu__tang__Fucus_vesiculosus  common black rockweed used in preparing kelp and as manure
  supertype:  rockweed  coarse brown seaweed growing on rocks exposed at low tide
  member of:  genus_Fucus  type genus of the family Fucaceae: cartilaginous brown algae
     member of:  family_Fucaceae__Fucaceae  small family of brown algae: gulfweeds; rockweeds
        member of:  order_Fucales__Fucales  coextensive with the family Fucaceae
           member of:  class_Phaeophyceae__Phaeophyceae  brown algae; mostly marine and littoral eukaryotic algae
              member of:  division_Phaeophyta__Phaeophyta  coextensive with class Phaeophyceae; in some classifications subsumed in the division Heterokontophyta

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