Plants large, loosely tufted, reddish brown to black-green; saxicolous, semi-aquatic. Stems 20-120 mm long, branching; in section round, central strand absent, inner cortical cells in 5-6 rows, with thickened corners, outer cortical cells in 3 rows, smaller, strongly thickened. Leaves somewhat fragile, extremely variable in size, lower leaves small, becoming larger above, erect-spreading wet or dry; broadly elliptical, (1-)2-3 mm long, to 1.5 mm wide; apex broadly obtuse, abruptly apiculate; margins plane, entire. Costa broad below, tapering to mid-leaf, laterally spurred, cells in surface view elongate; in section cells weakly differentiated, slightly smaller, thick-walled. Upper laminal cells variable, quadrate, rectangular or triangular, weakly thickened, smooth. Perichaetia terminal; leaves weakly differentiated from upper leaves. Pseudopodia 3-5 mm long, blackish; capsule exserted, elliptical, 2-3 mm long, dark red-black, dehiscence slits extending from mid-capsule to apex; spores round, 20-30 µm; brownish yellow, weakly papillose.
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