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noun
Any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori.
is a specific kind of: fern.
is a broader term that covers: brittle bladder fern, brittle fern, Cystopteris fragilis, fragile fern | Cystopteris montana, mountain bladder fern | berry fern, bulblet bladder fern, bulblet fern, Cystopteris bulbifera.
is a member of: Cystopteris, genus Cystopteris.
Find more on bladder fern elsewhere: etymology - rhymes - Wikipedia.
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