1) Fern genus 2) Genus cystopteris 
Cystopteris is a genus of ferns in the family Cystopteridaceae. These are known generally as bladderferns or fragile ferns. They are found in temperate areas worldwide. This is a very diverse genus and within a species individuals can look quite different, especially in harsh environments where they experience stress and remain small and stunted. ...
Cystopteris is the bladder-fern, a genus of polypodiaceous delicate flaccid ferns. Two are natives of Britain, Cystopteris fragilis (the brittle fern), which is common, and Cystopteris montana, which is very rare.
[n] - chiefly small perennial rock ferns: bladder ferns
genus Cystopteris noun chiefly small perennial rock ferns: bladder ferns; in some classifications placed in Polypodiaceae