Meaning of BLADDER FERN

Pronunciation:			'bladur furn
WordNet Dictionary
	Definition:		[n]  any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori
	See Also:		berry fern, brittle bladder fern, brittle fern, bulblet bladder fern, bulblet fern, Cystopteris, Cystopteris bulbifera, Cystopteris fragilis, Cystopteris montana, fern, fragile fern, genus Cystopteris, mountain bladder fern