Pseudoleskea patens

(Lindberg) Kindberg

Canad. Rec. Sci. 6: 20. 1894.

Illustrated
Basionym: Lescuraea patens Lindberg Meddeland. Soc. Fauna Fl. Fenn. 14: 75. 1888 (as Lesquereuxia)
Treatment appears in FNA Volume 28. Treatment on page 359. Mentioned on page 356, 361.

Plants small to medium-sized, in thin mats, dark green, olive green, black-green, or rarely yellow-green. Stems with branches slender to robust, julaceous, apices sometimes curving up; central strand present; paraphyllia many, filamentous to foliose, not branched. Leaves appressed to julaceous when dry, erect-spreading to patent when moist, dull, ovate, asymmetric, not or rarely falcate, (0.6–)0.7–1 mm; margins recurved proximally; apex abruptly acute to rarely short-acuminate, hair-point absent; costa not reaching acumen, green to orange-green, somewhat sinuate, terminal abaxial cells not or weakly projecting, not abaxially strongly dentate; alar cells quadrate to transversely elongate, region large; medial laminal cells quadrate, to 18 µm, 1(–2):1, opaque, moderately to strongly low rounded papillose over lumen or papillae sometimes off-centered, walls incrassate, not pitted; proximal juxtacostal cells usually shorter than medial, walls pitted or not. Capsule inclined, asymmetric, 0.5–2 mm; endostome basal membrane 1/3–1/2 exostome length, segments shorter than exostome, cilia well developed. Spores 10–14 µm.


Phenology: Capsules mature summer (Jul–Aug).
Habitat: Shaded to exposed rock and outcrops, mineral soil, near streams
Elevation: moderate to high elevations (900-3500 m)

Distribution

V28 560-distribution-map.gif

Alta., B.C., Nfld. and Labr., N.W.T., N.S., Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo., Eurasia.

Discussion

Pseudoleskea patens is relatively small and usually dull, dark, or olive green, with short laminal cells with rounded centrally located papillae; it differs from P. tribulosa by the recurved margins, weaker and lower laminal cell papillae lacking projecting apical salient, larger leaves with stronger plicae, and lack of the Morningstar-shaped projections of the abaxial apex cells of the costa.

Selected References

None.

Lower Taxa

None.
... more about "Pseudoleskea patens"
John R. Spence +
(Lindberg) Kindberg +
Lescuraea patens +
Alta. +, B.C. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +, Wyo. +  and Eurasia. +
moderate to high elevations (900-3500 m) +
Shaded to exposed rock and outcrops, mineral soil, near streams +
Capsules mature summer (Jul–Aug). +
Canad. Rec. Sci. +
Illustrated +
Pseudoleskea patens +
Pseudoleskea +
species +