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
Words Nearby rock brake
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use rock brake in a sentence
On the same cliff were tufts of the alpine woodsia and dense patches of rock-brake—but these stand in no need of the bee.
In the Open | Stanton Davis Kirkham
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