Pellaea brachyptera

(T. Moore) Baker in Hooker & Baker

in Hooker & Baker,Syn. Fil. ed. 2 477. 1874.

Endemic
Basionym: Platyloma brachyptera T. Moore Gard. Chron., 141. 1873
Treatment appears in FNA Volume 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.


Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes, usually on igneous substrates, occasionally on serpentine
Elevation: 900–2700 m

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.

Selected References

None.

Lower Taxa

None.

"thick" is not a number.

... more about "Pellaea brachyptera"
Michael D. Windham +
(T. Moore) Baker in Hooker & Baker +
cordate +, truncate +  and rounded +
Platyloma brachyptera +
glabrous +  and pubescent +
linear-oblong +
1cm;4cm +
dark-brown +  and black +
straight +
Calif. +, Oreg. +  and Wash. +
900–2700 m +
yellow +  and white +
obcordate;reniform +
Cliffs and rocky slopes, usually on igneous substrates, occasionally on serpentine +
monomorphic +
clustered;widely scattered +
recurved +  and reflexed +
noncircinate +  and circinate +
8 cm80 mm <br />0.08 m <br /> (40 cm400 mm <br />0.4 m <br />) +
entire +, erose +  and dentate +
pubescent +  and glabrous +
flattened +
Sporulating summer–fall. +
in Hooker & Baker,Syn. Fil. ed. 2 +
persistent +
linear-subulate +
0.1mm +  and 0.3mm +
brown +  and tan +
cristate +  and tetrahedral-globose +
dark colored +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Pellaea brachyptera +
species +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
crescent--shaped +  and roundish +
branched +  and anastomosing +