Plants small, green or yellow-green, often with reddish tinge. Stems 0.5-1(-2) cm; rhizoids yellow-red, brown, or red-brown. Leaves loosely set, broadly lanceolate to narrowly ovate, weakly concave, 0.4-1.5(-2) mm; base not decurrent; margins plane to revolute proximally, serrulate distally, limbidium absent; apex acute to acuminate; costa short-to long-excurrent, awn slender, ; alar cells similar to adjacent juxtacostal cells; proximal laminal cells abruptly quadrate to occasionally short-rectangular, 1-2:1; medial and distal cells 40-60 × 10-12(-14) µm, 3-5:1. Specialized asexual reproduction by rhizoidal tubers, on long rhizoids in soil, red to red-brown, spheric, 120-180 µm, cells 20-40 µm, smooth. Sexual condition dioicous. Capsule inclined or nutant, 2-3 mm.