Plants in dense mats, bright to dark green or olive green. Stems 0.4-1 cm, weakly julaceous to stringlike. Leaves erect when moist, ovate, weakly concave, 0.2-1 mm; base green; margins plane distally or rarely recurved proximally; apex acute, not cucullate, not hyaline; costa not reaching apex, apiculus absent or very short, <1 or 2 cells>, hyaline; proximal laminal cells short-rectangular, at least in alar region, 12-18 µm wide, 2-3:1; distal cells hexagonal, (25-)30-55 × 10-16 µm, usually 3:1, walls thin to somewhat thickened, not distinctly incrassate. Specialized asexual reproduction absent. Sporophytes unknown.