#genus_Pteridium__Pteridium  a genus of ferns belonging to the family Dennstaedtiaceae
  supertype:  #fern_genus  genera of ferns and fern allies
  member of:  #family_Dennstaedtiaceae
  member:  #pasture_brake__pasturebrake__bracken__brake__Pteridium_aquilinum  large coarse fern often several feet high; essentially weed ferns; cosmopolitan
  member:  #bracken__Pteridium_esculentum  fern of southeastern Asia; not hardy in cold temperate regions

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