#rockweed  coarse brown seaweed growing on rocks exposed at low tide
  supertype:  #brown_algae__brownalgae  algae having the chlorophyll masked by brown and yellow pigments
  subtype:  #fucus  #black_rockweed  #bladderwrack
  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

No statement uses or specializes #rockweed; click here to add one.