bladder fern

Từ điển WordNet v3.1 - WordNet Dictionary

noun

any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori
• Hypernyms:
fern
• Hyponyms:
brittle bladder fern, brittle fern, fragile fern, Cystopteris fragilis, mountain bladder fern,
Cystopteris montana, bulblet fern, bulblet bladder fern, berry fern, Cystopteris bulbifera
• Member Holonyms:
Cystopteris, genus Cystopteris