1. rock brake(n = noun.plant) cliff brake, cliff-brake - any of several small lithophytic ferns of tropical and warm temperate regions;
is a kind of fern
is a member of genus pellaea, pellaea
has particulars: coffee fern, pellaea andromedifolia, pellaea atropurpurea, purple rock brake, bird's-foot fern, pellaea mucronata, pellaea ornithopus
2. rock brake(n = noun.plant) - dwarf deciduous lithophytic ferns;
is a kind of fern
is a member of cryptogramma, genus cryptogramma
has particulars: american parsley fern, american rock brake, cryptogramma acrostichoides, cryptogramma crispa, european parsley fern, mountain parsley fern
3. rock brake(n = noun.plant) american wall fern, polypodium virgianum, rock polypody - chiefly lithophytic or epiphytic fern of North America and east Asia;
is a kind of polypody
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