Ber. Thätik. St. Gallischen Naturwiss. Ges. 1877 – 78: 484. 1880.
Plants pale yellow, green, or brownish, shiny. Stems erect-ascending, often filiform, branches of unequal lengths; pseudoparaphyllia broadly rounded-foliose. Stem leaves imbricate when dry, erect-spreading when moist, 1.1–1.2 mm; margins plane or somewhat recurved near base; apex broadly acuminate; alar cells subquadrate, small, region sizable; distal laminal cells linear, smooth, walls thick. Branch leaves 0.4–0.8 mm. Perichaetia with leaves pale, abruptly tapering, base sheathing, margins entire or nearly so, apex short-subulate. Seta smooth. Capsule 1.5–2 mm, neck short; stomata in neck; annulus well differentiated; exostome teeth pale yellow, cross striolate proximally; endostome basal membrane high, segments narrow, densely papillose, perforate along keel, cilia single, nodose. Calyptra unknown. Spores 12–19 µm, papillose.
Habitat: Dry, shaded cliffs and boulders
Elevation: moderate elevations (400-600 m)
B.C., Calif., Idaho, Oreg., Wash.