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Pellaea brachyptera (T. Moore) Bak.  
Family: Pteridaceae
[Allosorus bellus (T. Moore) O. Kuntze, moreAllosorus brachypterus (T. Moore) O. Kuntze, Hemionitis brachyptera (T.Moore) Christenh., Pellaea bella (T. Moore) Bak., Pellaea ornithopus var. brachyptera (T.Moore) D.C.Eaton, Platyloma bellum T. Moore, Platyloma brachyptera T. Moore]
Pellaea brachyptera image
Patrick Alexander
  • FNA
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Michael D. Windham in Flora of North America (vol. 2)
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. Pinnae strongly ascending, not decurrent on rachis, usually with 5--11 ultimate segments; costae straight, 5--20 mm, usually shorter than ultimate segments. 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. Veins of ultimate segments obscure. Sporangia short-stalked, containing 64 spores, intermixed with abundant farina-producing glands. Sporulating summer--fall. Cliffs and rocky slopes, usually on igneous substrates, occasionally on serpentine; 900--2700 m; Calif., Oreg., Wash. 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.

Pellaea brachyptera
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Patrick Alexander
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Patrick Alexander
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The PCC, and this data portal, were made possible by funding from the National Science Foundation’s Advancing Digitization of Biological Collections (ADBC) program, grant numbers 1802504, 1802352, 1802134, 1802033, 1802270, 1802255, 1802239, 1802446, 1802305.
The pteridoportal taxonomic thesaurus is based on the Checklist of Ferns and Lycophytes of the World, generously provided by Michael Hassler.