Pellaea brachyptera |
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Sierra cliff-brake, Sierran cliffbrake |
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Stems | compact, ascending, stout, 5–10 mm diam.; scales bicolored, linear-subulate, 0.1–0.3 mm wide, centers dark brown to black, thick, margins brown, thin, dentate. |
Leaves | monomorphic, clustered on stem, 8–40 cm; croziers sparsely villous. |
Petiole | dark brown, lustrous, flattened or slightly grooved adaxially, without prominent articulation lines. |
Blade | linear-oblong, 2-pinnate proximally, 1–4 cm wide; rachis brown throughout, straight, shallowly grooved adaxially, usually glabrous. |
Ultimate segments | linear, 5–20 mm, leathery, glabrous; margins on fertile segments strongly revolute, covering more than 1/2 abaxial surface, borders greenish, crenate; apex mucronate. |
Pinnae | strongly ascending, not decurrent on rachis, usually with 5–11 ultimate segments; costae straight, 5–20 mm, usually shorter than ultimate segments. |
Veins | of ultimate segments obscure. |
Sporangia | short-stalked, containing 64 spores, intermixed with abundant farina-producing glands. |
Pellaea brachyptera |
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Phenology | Sporulating summer–fall. |
Habitat | Cliffs and rocky slopes, usually on igneous substrates, occasionally on serpentine |
Elevation | 900–2700 m (3000–8900 ft) |
Distribution |
CA; OR; WA
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Discussion | The distinctive Pellaea brachyptera reportedly hybridizes with P. mucronata (A. F. Tryon 1957; D. B. Lellinger 1985); the hybrids are morphologically intermediate plants with malformed spores. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. |
Parent taxa | Pteridaceae > Pellaea |
Sibling taxa | |
Synonyms | Platyloma brachyptera |
Name authority | (T. Moore) Baker: in Hooker & Baker, Syn. Fil. ed. 2 477. (1874) |
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