Plants small, forming mats, green to yellow-green; corticolous or saxicolous. Primary stems long-creeping, flattened, with appressed scale leaves; secondary stems erect, 10-40 mm long, branching ± regular, distichous above stipe, curved when dry, pinnate; in section oval, cen tral strand absent, inner cortical cells thin-walled, yellowish, 3 or 4 cells wide, outer cortical cells smaller, thick-walled, red-brown, 3 or 4 cells wide; paraphyllia absent; pseudoparaphyllia filamentous. Leaves somewhat crowded, in ranks, erect wet, ± appressed dry, strongly concave; stem leaves elliptical to ovate, 0.8-1.1 mm long; apiculate; rounded to subauriculate at base; margins broadly inflexed above to overlapping at apex, serrulate; branch leaves similar but smaller than stem leaves, 0.5-0.8 mm long. Costa single and extending to midleaf or above, occasionally forked, sometimes shorter and double in branch leaves; dorsal and ventral surface cells elongate, smooth; in section elliptical, a small group of 6-8 cells in lower leaf. Upper laminal cells ± rhomboidal and sigmoid, heterogeneous, 15-25 µm long, 5-8 µm wide, walls weakly thickened, smooth; basal cells rectangular, 20-28 µm long, 6-8 µm wide, yellowish, walls thickened, smooth; alar cells quadrate, forming distinct groups, yellow, walls thickened. Gametangia and sporophytes not known.
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