Plants in dense tufts, usually with weak, clustered branchlets near stem apices with small, linear, erect-spreading, costate leaves, strongly crisped when dry, yellowish green to dark green, dull. Stems 0.5-3(-5) cm, densely tomentose with white to reddish brown rhizoids. Leaves erect-spreading, cirrate to strongly crisped when dry, smooth, (1-)2-3(-4) × 0.2-0.5 mm, concave below, subtubulose to keeled above, lanceolate at base, acuminate above to an acute apex, rough above on abaxial surface; margins irregularly serrate to serrulate in distal half of leaves; laminae 1-stratose; costa percurrent to shortly excurrent, 1/6-1/4 the width of the leaves at base, rough with papillae or teeth on abaxial surface in distal half of leaf, abaxial ridges absent, with a row of guide cells, two weakly developed stereid bands above and below, not extending to the leaf middle, adaxial and abaxial epidermal layers of cells not differentiated or with a few cells enlarged in both layers; cell walls between lamina cells not bulging; leaf cells smooth below, mammillose or usually abaxially prorate or toothed in distal half of leaves, giving leaves a dull appearance; alar cells 1-stratose, differentiated or sometimes indistinctly differentiated, not extending to costa; proximal laminal cells rectangular to oblong-rectangular, not pitted or with few pits, (10-)20-32(-50) × (4-)6-8(-13) µm; distal laminal cells usually quadrate to short-rectangular, some cells transversely elongate, not pitted, (5-)8-10(-26) × (2-)3-6(-9) µm. Sexual condition dioicous; male plants as large as females; interior perichaetial leaves abruptly acuminate, convolute-sheathing. Seta 0.5-1.5 cm, solitary, rarely 2 per perichaetium, yellowish to reddish brown. Capsule 1.2-2 mm, straight and erect to slightly inclined, rarely somewhat arcuate, smooth, striate when dry, light yellowish brown; operculum 1-1.5 mm. Spores 12-24 µm.
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