Delicate plants in dense tufts or mats, light green to blackish green above, brown below. Stems short, often branching, 1.5–6.0 mm in length, transverse section rounded-pentagonal, central strand present, comparatively large, sclerodermis absent or weak, hyalodermis absent; axillary hairs ca. 3 cells in length, moniliform, basal cell with thicker walls than the distal cells; rhizoids present below. Leaves erect or laxly spreading when dry, erect to spreading, lax when moist, obovate to oblong-obovate, larger above, 0.3–0.4 mm in length, upper lamina flat, margins plane, crenulate above by bulging cell walls, occasionally serrulate, occasionally with 1 or 2 additional large teeth above; apex rounded or very broadly acute, occasionally apiculate by a sharp, conical cell; base not differentiated in shape; costa slender and ending at midleaf or ending near apex, seldom percurrent, superficial cells on both sides elongate, ca. 2 rows of cells across costa ventrally at midleaf, costal transverse section elliptical, stereid band single, small, present centrally, often absent and costal section appearing homogeneous, epidermis absent ventrally and present dorsally, guide cells 2 in 1 layer, hydroid strand absent; upper laminal cells quadrate to hexagonal, occasionally longer than broad, 12–18 µm in width, 1(–2):1, walls thin, delicate, superficially convex on both sides; 1–3 small, simple, hollow, conical papillae per lumen, scattered over lamina; basal cells weakly differentiated across lamina, rectangular, little wider than upper cells, 2–3:1, walls thin. Propagula elliptical to clavate, to 280 µm in length, with ca. 6 transverse and 6 inner longitudinal walls, consisting of about 14 cells, borne in leaf axils or on ventral surface of leaves, sometimes 1–3 in a cup-like terminal rosette of leaves. Dioicous. Perichaetia terminal, inner leaves ovate, to 0.7 mm in length, sheathing, smooth, lower cells laxly rectangular, paraphyses moniliform. Perigonia terminal, paraphyses absent, plants often small, nearly stemless. Seta 3–6 mm in length, 1 per perichaetium, yellowish brown, twisted clockwise; theca 0.6–0.8 mm in length, black or brown, often shiny as if varnished, ovate to short-elliptical, exothecial cells large, rounded-hexagonal, 35–55 µm in diameter, mostly thin-walled, stomates phaneropore, at base of theca but often absent, annulus of about 2 rows of little-differentiated cells; peristome teeth absent. Operculum relatively large, obliquely rostrate from a low-conic base, 0.8–1.0 mm in length, cells weakly twisted clockwise. Calyptra cucullate, smooth, ca. 1.3 mm in length. Spores 11–15 µm in diameter, light brown, finely papillose. Laminal KOH color reaction yellow, or negative to black, or pink to deep purple. Reported chromosome number n = 13.