Cystopteris tenuis (Michx.) Desv.
Family: Dryopteridaceae
MacKay's brittle fern,  more...
[Cystopteris fragilis var. mackayi (L.) Bernh.,  more]
Cystopteris tenuis image
Robert W. Freckmann  
Etymology: Cystopteris: from Greek cystis, "bladder," and pteris, "fern"
Plants: perennial fern
Habitat: moist rocky crevices
Conservation Status: Native
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