Plants small, green or yellow-green, often with reddish tinge. Stems 0.4-1.5(-2) cm; rhizoids yellow. Leaves imbricate to loosely set, ovate-lanceolate to narrowly ovate, weakly concave, 0.4-1.5(-2) mm; base not decurrent; margins revolute proximally, serrulate distally, limbidium absent; apex acute to acuminate; costa excurrent to long-excurrent, awn stout; alar cells similar to adjacent juxtacostal cells; proximal laminal cells gradually quadrate to short-rectangular, 1-2:1; medial and distal cells 50-60(-70) × 12-14(-16) µm, 3-4:1. Specialized asexual reproduction by rhizoidal tubers, on long rhizoids in soil, yellow or rarely orange, ± spheric, (100-)120-180(-200) µm, cells 25-40 µm, smooth. Sexual condition dioicous or rarely synoicous. Capsule inclined or nutant, 2-3(-4) mm.
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