Noun: bladder fern bla-dur furn
- Any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori
"The delicate fronds of the bladder fern add texture to rock gardens"
Derived forms: bladder ferns
Type of: fern
Part of: Cystopteris, genus Cystopteris
Encyclopedia: Bladder fern