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Definition of American rock brake
1. Noun. Rock-inhabiting fern of northern North America growing in massive tufts and having fronds resembling parsley.
Exact synonyms: American Parsley Fern, Cryptogramma Acrostichoides
Group relationships: Cryptogramma, Genus Cryptogramma
Generic synonyms: Rock Brake
Group relationships: Cryptogramma, Genus Cryptogramma
Generic synonyms: Rock Brake