rock brake


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rock brake

n
(Plants) 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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Noun1.rock brake - any of several small lithophytic ferns of tropical and warm temperate regionsrock brake - any of several small lithophytic ferns of tropical and warm temperate regions
fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
genus Pellaea, Pellaea - genus of chiefly small rock-loving ferns; in some classification systems it is placed in the family Polypodiaceae or Adiantaceae
coffee fern, Pellaea andromedifolia - evergreen fern of California and Baja California
Pellaea atropurpurea, purple rock brake - very short shallowly creeping North American fern usually growing on cliffs or walls and having dark glossy leaf axes
bird's-foot fern, Pellaea mucronata, Pellaea ornithopus - cliff brake of California and Baja California having purple-brown leafstalks
2.rock brake - dwarf deciduous lithophytic ferns
fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
Cryptogramma, genus Cryptogramma - sometimes placed in family Polypodiaceae or Cryptogrammataceae
American parsley fern, American rock brake, Cryptogramma acrostichoides - rock-inhabiting fern of northern North America growing in massive tufts and having fronds resembling parsley
Cryptogramma crispa, European parsley fern, mountain parsley fern - fern of Europe and Asia Minor having short slender rhizome and densely tufted bright green fronds resembling parsley
3.rock brake - chiefly lithophytic or epiphytic fern of North America and east Asiarock brake - chiefly lithophytic or epiphytic fern of North America and east Asia
polypody - any of numerous ferns of the genus Polypodium