| NOUN | plant | bladder fern | any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori |
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| Meaning | Any fern of the genus Cystopteris characterized by a hooded indusium or bladderlike membrane covering the sori. | |
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| Member of | Cystopteris, genus Cystopteris | chiefly small perennial rock ferns |
| Narrower | brittle bladder fern, brittle fern, fragile fern, Cystopteris fragilis | Delicate fern widely distributed in North America and European having thin pinnatifid fronds with brittle stems |
| bulblet fern, bulblet bladder fern, berry fern, Cystopteris bulbifera | North American fern often bearing bulbils on the leaflets | |
| mountain bladder fern, Cystopteris montana | fern of rocky mountainous areas of hemisphere | |
| Broader | fern | Any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward |
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