Plants in densely compact, usually fragile (individual stems easily separated) cushions or mats, olivaceous, brownish green, or nearly black. Stems 0.5-2(-4) cm, central strand distinct. Leaves erect, usually imbricate when dry, ovate-triangular to ovate-lanceolate, keeled distally, concave proximally, (0.7)-0.9-1.5(-1.8) mm, usually unevenly 2-stratose distally; margins usually recurved, smooth, 1-stratose or 2-stratose; apices acute; costa usually long-excurrent as a spinulose-denticulate, usually decurrent, often flexuose awn, smooth; basal marginal cells quadrate or oblate, sometimes with transverse walls thicker than longitudinal walls, trigonous; distal laminal cells quadrate, ovate, or short-rectangular, 5-8 µm wide, smooth, weakly sinuose or straight. Sexual condition dioicous. Capsule dark reddish or orange-brown, cupulate or short-cylindric, 0.6-1.1 mm; exothecial cells isodiametric or elongate, usually thin-walled; stomata present; peristome patent to squarrose, 300-420 µm, orange or light brown, papillose, strongly perforated. Spores 10-14 µm, verruculose.
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