rock brake

noun

any of various ferns of the genera Pellaea and Cryptogramma , which grow on rocky ground and have sori at the ends of the veins

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Example Sentences

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Clute, speaking of this fern as "the rock brake," calls it a border species, as its home is in the far north--Arctic America to Lake Huron, Lake Superior, Colorado and California.

From Project Gutenberg

rock-bound rock cake

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