| NOUN | plant | rattlesnake fern, Botrychium virginianum | American fern whose clustered sporangia resemble a snake's rattle |
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| Meaning | American fern whose clustered sporangia resemble a snake's rattle. | |
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| Synonym | Botrychium virginianum | |
| Broader | grape fern | A fern of the genus Botrychium having a fertile frond bearing small grapelike clusters of spore cases |