| 单词 | rock brake |
| 释义 | rock brake (once / 3939771 pages) n WORD FAMILY rock brake 1n dwarf deciduous lithophytic ferns Hypo|Hyper 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 fernfern of Europe and Asia Minor having short slender rhizome and densely tufted bright green fronds resembling parsley fern any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores 2n any of several small lithophytic ferns of tropical and warm temperate regions Syn|Hypo|Hyper cliff brake, cliff-brake Pellaea andromedifolia, coffee fern evergreen fern of California and Baja California Pellaea atropurpurea, purple rock brakevery short shallowly creeping North American fern usually growing on cliffs or walls and having dark glossy leaf axes Pellaea mucronata, Pellaea ornithopus, bird's-foot ferncliff brake of California and Baja California having purple-brown leafstalks fern any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores 3n chiefly lithophytic or epiphytic fern of North America and east Asia Syn|Hyper American wall fern, Polypodium virgianum, rock polypody polypody any of numerous ferns of the genus Polypodium |
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