Plants reddish green to brown. Stems 0.1-0.2 mm, axillary hairs of 3-4 rectangular cells with basal 1-2 cells thicker-walled. Leaves not contorted and loosely folded along the midline when dry, erect to erect-spreading when wet, broadly ovate and concave or broadly channeled, strongly reflexed apically, 0.8-1.1 mm long, grading insensibly into perichaetial leaves with upper lamina concave to short-tubulose weakly constricted above clasping-saccate base; leaf margins weakly to strongly recurved from midleaf to near apex, entire or weakly denticulate near apex, border of 1-3 narrower, thicker-walled and less papillose cells often weakly differentiated near apex; costa excurrent as stout, sharp, smooth, red, reflexed apiculus, mostly 25-35(-50) µm in width, superficial cells of costa elongate and papillose with hemispheric papillae dorsally, short-rectangular and scattered papillose ventrally, transverse section round, with one strong circular to flattened-oval stereid band (guide cells apparently 2 in a single layer, commonly thick-walled and except for position indistinguishable from stereid cells), hydroid strand usually present in thicker portions of costa; upper and medial laminal cells subquadrate to short-rectangular, (11-)13-18 µm long x 10-13(-15) µm wide, papillae solid or occasionally hollow, simple to bifid, 2-4 per cell; basal cells 12-15 µm wide, 35:1. Sexual condition synoicous and paroicous. Perichaetia with inner leaves to 1.2 mm long, broadly ovate to ovate-deltoid, commonly constricted just above broadly sheathing base, differentiated thin-walled basal cells extending 2/3 way or more up leaf. Sporophytes 1(-2) per perichaetium. Seta short, 0.10-0.20 mm long, hyaline, straight or curved, delicate and easily broken. Capsule spheric, 0.30-0.35 mm in diameter, yellow-brown, exothecial cells quadrate to rhombic, 30-40 µm wide. Vaginula nearly half the size of capsule, ca 150 µm in length. Calyptra ca 0.06 mm long, quickly lost. Spores 20-23 x 12-15 µm, spiculose-papillose. Rhombic, 30-40 µm wide. Vaginula nearly half the size of capsule, ca 150 µm in length. Calyptra ca 0.06 mm long, quickly lost. Spores 20-23 x 12-15 µm, spiculose-papillose.
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