Plants large, forming mats, green to yellowish green or yellowish brown above, brown below; saxicolous or corticolous. Primary stem creeping, up to 70 mm long, irregularly branched, frequently tomentose; rhizoids smooth, reddish brown; secondary stem erect-curved, branching by subperichaetial innovations, occasionally tomentose below; in section round, central strand absent, inner cortex 8-12 cells across, thin to thick-walled, outer cortical cells in 2-4 rows, walls incrassate or consisting of stereids, outer surface rough. Stem leaves weakly rugose to rugose, occasionally falcate, frequently reflexed; ovate, ovate-acuminate, ovate-ligulate or ovate-lanceolate to lanceolate, (0.8-)1.0-1.7(-2.0) mm long; apex acute to acuminate; margins plane, entire to irregularly denticulate above, denticulate to spinulose below, decurrent; costa ending below apex to subpercurrent or infrequently mucronate. Branch leaves crowded, ± equal in size, secund, in 4 or 5 rows, generally rugose, occasionally falcate; ovate-lanceolate or oblong-lanceolate to lanceolate to narrowly lanceolate, 1.0-2.5 mm long; apex acuminate, acute or rarely rounded-obtuse; margins plane, entire to irregularly denticulate above, denticulate to spinulose below, decurrent; cells of decurrency irregularly rectangular, inflated, smooth, frequently tuberculate at margin; unistratose. Costa ending below apex to subpercurrent or occasionally mucronate; ventral superficial cells rounded or short-rectangular above, linear below; dorsal superficial cells rounded to oval above, linear below; in cross section subround, flat ventrally, bulging dorsally, 2 ventral surface cells incrassate or substereids, central cells incrassate or consisting of stereids, dorsal surface cells incrassate or consisting of substereids. Laminal cells rounded-hexagonal or rounded-quadrate, homogeneous, incrassate, frequently obscure, 7-10 µm, smooth to papillose above, papillose to strongly papillose or spinulose below, papillae single, conical; basal marginal cells occasionally subquadrate, protruding. Dioicous. Perigonia lateral, gemmate, leaves broadly ovate-apiculate. Perichaetia terminal on branches; leaves ovate-subulate to oblong-subulate, 2.3-3.2 mm long. Seta 1.0-1.8 mm long, yellowish brown or reddish brown. Capsule elliptic; urn 1.2-1.8 mm long; neck 0.6-1.0 mm long; yellowish brown or reddish brown to brown, 8-ribbed; exothecial cells irregular rectangular to quadrate, smaller at mouth, incrassate; stomata present at base of urn and on neck; annulus weakly differentiated. Peristome recurved when dry; exostome teeth 16, fused below to form 8 pairs, perforated above, 0.4 mm long, yellow-brown, papillose below, vertically striolate-papillose above; endostome segments 8-16, alternating-with teeth, shorter than exostome, narrow, hyaline, outer surface smooth, inner surface vertically striolate. Operculum 0.8-1.0 mm long. Calyptra 2.2-2.5 mm long, yellow or yellowish brown. Spores 15-23 µm.
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