genus Cystopteris ge·nus·cys·topteris uncommon noun 1. chiefly small perennial rock ferns: bladder ferns; in some classifications placed in Polypodiaceae SynonymsCystopterisgenus Cystopteris Related words Broader terms fern genus Parts Dryopteridaceae Part of bladder fern WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
