Plants: small, green to red-green. Stems: 0.5–2 cm, fertile stems singly rosulate, rare, innovations elongate, evenly foliate. Leaves: of main rosette and innovations somewhat differentiated; rosette leaves somewhat irregularly twisted to contorted when dry, erect-spreading when moist, ovate to obovate, flat, 0.6–2 mm; base not decurrent; margins recurved to mid leaf, entire or weakly serrulate distally, limbidium absent or weak, of 1 row of cells; apex acute; costa not reaching apex to excurrent, awn pigmented or hyaline, slender, irregularly twisted when dry; proximal laminal cells long-rectangular; medial and distal cells long-rhomboidal, 12–18 µm wide, 3–5:1, walls thin, not porose; innovation leaves red-brown, ± imbricate when dry, broadly lanceolate to ovate, concave, 0.4–1.5 mm, awn present, short, pigmented. : Specialized asexual reproduction by gemmae in distal leaf axils or rarely on leaves, red, finely papillose, and rhizoidal tubers, orange, red, or pink, brighter than rhizoids, (100–)150–400 µm. Sexual: condition dioicous. Capsule: nutant, brown, subcylindric, 2–3 mm. Phenology: Capsules mature Apr–Jul.

Damp rotting wood, bark, soil. low to moderate elevations (0-500 m). Ala., Fla., Ga., La., Miss., S.C., Mexico, West Indies, Central America, Pacific Islands (Hawaii).

Rosulabryum pseudocapillare is very closely related to R. flaccidum, but differs in ecology, distribution, and color of the filiform gemmae and tubers. The sporophytes are rare. See discussion under 8. R. flaccidum.