#genus_Cystopteris__Cystopteris  chiefly small perennial rock ferns: bladder ferns; in some classifications placed in Polypodiaceae
  supertype:  #fern_genus  genera of ferns and fern allies
  member of:  #family_Dryopteridaceae
  member:  #bladder_fern__bladderfern  any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori

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