Plants small, delicate, up to 1.0 cm long, shiny, golden green, in dense mats on tree fern trunks. Stems erect from persistent protonemata, simple, terminated by perigonia or perichaetia. Leaves along proximal region of stems small, lanceolate, acuminate, monomorphic, loosely erect-spreading; leaves along distal portions of stems larger, dimorphic, in three distinct ranks; dorsal ranks of leaves somewhat erect-falcate to erect-deflexed when dry, erect when moist, 1.1-1.3 mm long, oblong to narrowly ovate- oblong, acuminate, stoutly aristate, ventral rank of leaves erect when dry, 0.7-0.8 mm long, ovate to obovate, acuminate, cuspidate; margins entire, thickened and appearing revolute; costa strong, single, excurrent and filling the arista or cusp; upper cells 6-8 ,um wide, rounded-quadrate, thick-walled, smooth, unistratose except at margins, there the marginal 2-4 rows distinctly bistratose forming a strongly differentiated border; basal cells rounded-quadrate to shortly elliptic-rectangular, thick-walled, smooth; alar cells undifferentiated. Perichaetial leaves loosely erect, strongly differentiated from vegetative leaves, 4.0-5.0 mm long, linear to linear-lanceolate, subulate to long-acuminate; perigonial leaves loosely erect, strongly differentiated from vegetative leaves, 2.1-2.3 mm long, subulate from an ovate, sheathing, expanded base. Dioicous. Setae 0.8-1.0 mm long, erect, smooth; capsules 1.2-1.4 mm long, cylindric, smooth, erect, immersed, sometimes slightly wider in lower portion; exothecial cells 12-25 Atm wide, 18-50 ,um long, rounded-rectangular to quadrate, becoming shorter and reddish at rim; stomates superficial, at base of capsule. Peristome none. Annuli of one row of short-elliptic cells. Opercula conic, long rostrate. Calyptrae short, cucullate, with a scabrous beak. Spores 12-16 ,um, finely pa- pillose. Chromosome number n = 6 (Helen Ramsay, pers. comm., voucher specimen-Vitt 28393).