Plants small, green or yellow-green, often with pinkish tinge. Stems 0.4-2(-3) cm; rhizoids brown. Leaves imbricate to loosely set, broadly lanceolate to narrowly ovate, weakly concave, 0.4-1.5(-2) mm; base rarely weakly decurrent; margins plane to weakly revolute proximally, entire to serrulate distally, limbidium absent; apex acute; costa percurrent to short-excurrent, awn slender; alar cells quadrate, region differentiated; proximal laminal cells gradually rectangular, 2-4:1; medial and distal cells 60-100(-120) × 8-16(-20) µm, 6-8:1. Specialized asexual reproduction by rhizoidal tubers, on long rhizoids or sometimes in proximal leaf axils and at stem base, brown, pyriform, 40-80 µm, cells 15-25 µm, smooth; rarely by bulbils in distal leaf axils, green, leafy, small. Sexual condition dioicous. Capsule inclined or nutant, 1-3 mm.
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