Plants reddish green. Stems ca 0.10 mm; axillary hairs of 1(-2) rectangular hyaline cells, rare. Leaves not or weakly contorted and channeled when dry, weakly-spreading when wet, ovate and concave or broadly channeled, strongly to weakly reflexed or straight apically, 0.6-1.1(-1.4) mm long, grading insensibly into perichaetial leaves, upper lamina broadly concave to channeled only along costa; leaf margins mostly plane but often recurved near apex, entire (although crenulate by strong papillae), marginal cells not differentiated; costa short-excurrent as a sharp apiculus of one smooth cell, mostly 40-50(-55) µm wide, dorsal superficial cells of costa elongate and densely papillose with simple to bifid papillae, and often also prorulose by projecting cell ends, short-rectangular to rhombic and densely papillose ventrally, transverse section round, one stereid band evident, strong, circular, guide cells apparently absent, hydroid strand apparently absent; upper and medial laminal cells subquadrate or irregular (10-)13-16 µm, papillae solid or occasionally hollow, simple to bifid, 2-4 per cell; basal cells 12-20 µm wide, 3-6:1. Sexual condition rhizautoicous by small 2-3 leaved male buds buried in rhizoid mass at base of perichaetial plants. Perichaetia with inner leaves to 1.4 mm long, broadly ovate, occasionally constricted just above broadly sheathing or bulging-spheric base, differentiated thin-walled basal cells extending 2/3 way or more up leaf. Sporophytes 1(-2) per perichaetium. Seta very short or nearly absent, 0.015-0.040 mm long, hyaline, straight, delicate and easily broken. Capsule spheric or very short-oval, 0.25-0.30 mm in diameter, brown, exothecial cells quadrate to rhombic, or occasionally short-rectangular, 25-30 µm wide, 1(-2):1. Vaginula ca 1/4 size of the capsule, ca 100-120 µm in length. Calyptra small, ca 0.14 mm long. Spores 20-25 x 17-20 µm, smooth or weakly low-papillose.
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