#genus_Ceratopteris__Ceratopteris  water ferns
  supertype:  #fern_genus  genera of ferns and fern allies
  member of:  #family_Parkeriaceae
  member:  #floating_fern__water_sprite__watersprite__ceratopterispteridioide  aquatic fern of tropical America often used in aquariums
  member:  #Ceratopteris_thalictroides__floating_fern  pantropical aquatic fern

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