Pellaea breweri

D. C. Eaton

Proc. Amer. Acad. Arts 6: 555. 1865.

Endemic
Treatment appears in FNA Volume 2.

Stems compact, ascending, stout, 5–10 mm diam.; scales uniformly reddish-brown, linear-subulate, 0.1–0.3 mm wide, thin, margins sinuous, nearly entire. Leaves monomorphic, clustered on stem, 2.5–20 cm; croziers sparsely villous. Petiole brown, lustrous, rounded adaxially, with prominent articulation lines near base. Blade linear-oblong, pinnate-pinnatifid proximally, 1–4 cm wide; rachis brown proximally, green distally, straight, rounded adaxially, glabrous to sparsely villous. Pinnae ascending or perpendicular to rachis, decurrent on rachis, deeply 2-lobed (mitten-shaped) near base of leaf; costae absent. Ultimate segments lanceolate-deltate, 5–25 mm, herbaceous, glabrous; margins recurved on fertile segments, covering less than 1/2 abaxial surface, borders whitish, erose-denticulate; apex obtuse or rounded. Veins of ultimate segments evident. Sporangia sessile or subsessile, containing 64 spores, not intermixed with farina-producing glands. 2n = 58.


Phenology: Sporulating summer–fall.
Habitat: Cliffs and rocky slopes, on a variety of substrates including granite and limestone
Elevation: 1600–3800 m

Distribution

V2 246-distribution-map.gif

Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Pellaea breweri is distinguished from other North American taxa (except for some populations of P. glabella) by the presence of prominent articulation lines near the base of the petiole. The leaves are easily detached, and many herbarium specimens consist of separate leaves and stems, the latter covered with petiole bases of approximately equal length.

Selected References

None.

Lower Taxa

None.
... more about "Pellaea breweri"
Rounded (?) +  and Obtuse (?) +
Michael D. Windham +
D. C. Eaton +
cordate +, truncate +  and rounded +
glabrous +  and pubescent +
pinnate-pinnatifid +  and linear-oblong +
1cm;4cm +
erose-denticulate +
Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1600–3800 m +
yellow +  and white +
obcordate;reniform +
Cliffs and rocky slopes, on a variety of substrates including granite and limestone +
monomorphic +
clustered;widely scattered +
recurved +  and reflexed +
noncircinate +  and circinate +
2.5 cm25 mm <br />0.025 m <br /> (20 cm200 mm <br />0.2 m <br />) +
entire +, erose +  and dentate +
pubescent +  and glabrous +
Sporulating summer–fall. +
perpendicular +  and ascending +
Proc. Amer. Acad. Arts +
green +  and brown +
glabrous +  and sparsely villous +
reddish-brown +
persistent +
linear-subulate +
thin +, 0.1mm +  and 0.3mm +
subsessile +  and sessile +
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 breweri +
species +
0.5 cm5 mm <br />0.005 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
crescent--shaped +  and roundish +
branched +  and anastomosing +