Plants in loose tufts, dark to light green, dull. Stems 3-8 cm, densely tomentose below with reddish brown rhizoids. Leaves falcate-secund, flexuose, contorted when dry, slightly undulate, (5-)6.5-9(-10) mm × 1-1.5 mm, concave below, keeled above, from a lanceolate base to a long-acuminate apex; margins plane, strongly serrate above; laminae 1-stratose, rarely with 2-stratose regions on margins or near costa; costa percurrent to slightly excurrent, 1/6-1/5 the width of the leaves at base, papillose to spinose above on numerous, low abaxial ridges, with a row of guide cells, two thick, well-developed stereid bands above and below extending to apex, adaxial epidermal layer of cells not differentiated, the abaxial layer differentiated; cell walls between lamina cells not bulging or weakly bulging; leaf cells prorate on abaxial surface, sometimes papillose adaxially; alar cells 2-stratose, rarely 3-stratose in parts, differentiated, not extending to costa; proximal laminal cells rectangular, pitted, (22-)40-64(-126) × (2-)7-8(-10) µm; distal laminal cells short-rectangular to rectangular, not pitted, ± in longitudinal rows, marginal cells usually more elongate, some distal cells with long toothlike projections, scattered on abaxial surface, (7-)12-18(-42) × (5-)8-12(-16) µm. Sexual condition pseudomonoicous; dwarf males on stem rhizoids of female plants; interior perichaetial leaves abruptly long-acuminate, convolute-sheathing. Seta 2-3.5 cm, often aggregate 2-5 per perichaetium, sometimes solitary, yellow, brown or reddish yellow. Capsule 2-3 mm, arcuate, inclined to horizontal, furrowed when dry, yellow to light brown; operculum 1.5-3 mm. Spores 9-20 µm.
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