Plants large, caespitose, green to yellow-green above, brownish below; saxicolous. Stems 30-70 mm tall, occasionally branching, with sparse, reddish or whitish tomentum below; in section round, central strand small, inner cortical cells large, in 4-6 rows, outer cortical cells small, weakly thickened, in 2-3 rows. Leaves somewhat crowded, falcate-secund with flexuose subulae dry, falcate-secund but less flexuose wet, subulate to setaceous above oblong to oval base, 6-9 mm long; ventral surface broadly channelled above; margin erect, strongly serrate or occasionally almost entire. Costa broad, 1/3 of width of leaf base, filling subula, ventral superficial cells linear, smooth, dorsal superficial cells rectangular, becoming shorter above base, sharply mammillose; in section ventrally concave, guide cells (20-)30-34(-50) above base, medium-sized, strongly thickened; in proximal section ventral stereid band strong, 2-4 cells thick, ventral surface cells not differentiated, dorsal stereid band strong, 3-4 cells thick, dorsal surface cells not differentiated; in distal section ventral substereid band 2 cells thick centrally, quadrate, laterally cells in single layer, quadrate, incrassate, ventral surface cells not differentiated, dorsal internal cells in 2 layers, slightly smaller than guide cells, absent laterally, dorsal surface cells vertically elongate, incrassate, projecting dorsally as large, sharp mammillae, tip of mammillae strongly thickened. Laminal cells rectangular, incrassate, frequently irregularly thickened, pitted, smooth; in section strongly thickened, lumens horizontally compressed; basal cells becoming long-rectangular, thin-walled, linear at basal margin; alar cells large, broadly rectangular, thin-walled, reddish. Sporophyte not known.
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