Plants in coarse sods or mats. Stems 4-8(-13) cm, dark reddish brown to black, prostrate or more often dendroid, often defoliate proximally, branches crowded, 1.5-4 cm, arising in clusters from adjacent stem segments, occasionally producing flagelliform branches; pseudoparaphyllia foliose. Stem leaves somewhat contorted when dry, keeled, 1 mm wide, proximal leaves scalelike and erose, distal leaves elongate-triangular to deltoid, plicate, tapering to often subulate, flexuose apex; margins 1-stratose, 1 or 2 cells wide, sometimes forming basal auricles 2-10 cells wide, limbidia usually disappearing near acumen, spurs sometimes extending into lamina, often absent in most proximal leaves; basal laminal cells 7-40 × 5-14 µm. Branch leaves spreading 50-60°, 1.5-3.8 × 1-2 mm; margins serrate in distal 1/3, limbidia strong, disappearing very near acumen, or confluent with costa, to 3.5 mm; basal laminal cells 7-50(-60) × 3-14 µm; distal cells 3-32 × 3-14 µm; leaves on flagelliform branches wide-spreading to squarrose, limbidia absent or poorly developed, 0.4-0.8 × 0.1-0.3 mm. Perichaetia with leaves squarrose, lanceolate, 1.5-2.5 × 0.8-1 mm, margins serrulate distally or entire, limbidia absent, apex long-acuminate, costate. Sporophytes unknown.