Plants red-or black-brown. Stems to 1 cm, central strand present or rarely absent. Leaves dimorphic: leaves on main stems leaves appressed when dry, weakly spreading and not keeled when moist, ovate-triangular or ovate-lanceolate to lanceolate, broadly concave adaxially across leaf, usually (0.3-)0.5-0.6(-0.8) mm, base scarcely differentiated in shape, margins plane to weakly recurved at mid leaf, minutely crenulate, apex rounded-obtuse to obtusely acute, seldom narrowly acute; costa ending 3-6 cells below the apex, not strongly spurred, not much widened or tapering, without an adaxial pad of cells, adaxial costal cells quadrate, 2 cells wide at mid leaf, guide cells in 1 layer; basal laminal cells weakly differentiated medially, walls thickened, short-rectangular, not perforated; distal laminal cells 9-12 wide, 1:1, papillae low, simple or scablike, 1 over each lumen, rarely absent, lumens angular to ovate, walls evenly thickened, weakly convex on both sides of lamina, 1-stratose; leaves of branchlets oval to orbicular, strongly concave, cochleariform, about 0.2 mm, julaceous, distal laminal cells short-rectangular, 7-11 µm wide, 1-2:1. Specialized asexual reproduction specialized structures absent. Sexual condition only perichaetial plants seen. Sporophytes unknown. Distal laminal KOH reaction red.
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