Plants in loose to dense tufts, green to yellowish green, glossy. Stems 2-8 cm, densely tomentose with white to reddish brown rhizoids. Leaves falcate-secund to straight and erect, sometimes slightly crisped, smooth, (5-)8-10(-12) × 0.8-1.5 mm, concave proximally, keeled or tubulose above, lanceolate, apex acute; margins strongly serrate in the distal part, entire proximally; laminae 1-stratose; costa ending before apex to shortly excurrent, 1/12-1/5 the width of the leaves at base, with 2, rarely 4, toothed ridges on the abaxial surface extending from about the leaf middle nearly to the apex, rarely almost smooth, with a row of guide cells, two thin stereid bands, adaxial epidermal layer of cells not differentiated, the abaxial layer interrupted by several enlarged cells that form part of the abaxial ridge, not extending to the apices; cell walls between lamina cells not bulging; leaf cells smooth; alar cells 2-stratose, well-differentiated, sometimes extending to costa; proximal laminal cells linear-rectangular, pitted, (52-)65-105(-120) × (10-)12-18(-22) µm; distal laminal cells shorter, sinuose, pitted, (42-)54-90(-108) µm × (10-)12-14(-16) µm. Sexual condition pseudomono-icous or dioicous; dwarf males on rhizoids of female plants or male plants as large as females and growing intermixed or in ± separate tufts; perichaetial leaves gradually acuminate, not or partially convolute-sheathing. Seta 1.5-4 cm, solitary, sometimes 2 per perichaetium, yellow to reddish brown. Capsule 2-3.8 mm, arcuate, inclined to horizontal, smooth to striate when dry, yellow to dark reddish brown; operculum 2-3.8 mm. Spores 18-26 µm.
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