Hypnum crispifolium Hooker, Musci Exot. 1: plate 31. 1818

Plants 4-8 cm, in loose mats, green to yellowish, often appearing brownish. Stems ± pinnate, smooth; paraphyllia absent. Leaves ovate, to 3 mm; margins serrate, limbidium present; apex long-acuminate, hair-point present; costa ending before apex, abaxial surface smooth; distal medial laminal cells hexagonal or subquadrate, 8-9 µm, 1-papillose. Seta 1-2 cm, rough. Capsule inclined to almost horizontal, oblong, 1.5-3 mm; operculum long-rostrate. Spores 9-12 µm, smooth.

Rotten logs, tree bases, soil over rock; low to moderate elevations; Alta., B.C.; Alaska, Calif., Idaho, Mont., Oreg., Wash.; e Asia (Japan, Russian Far East).