Campylopus albidovirens Herz., Biblioth. Bot. 87: 19. 1916. Type. Bolivia, über Tablas, Herzog 2782.

Campylopus guatemalensis Bartr., Bryologist 49: 110. 1946. Type. Guatemala, Dept. Quezaltenango, Standley 86159 (FH).

Plants slender to medium, compactly tufted, pale greenish yellow with a grayish, glossy sheen when dry; stems variably tomentose, 2–7 cm long, hylodermis present. Leave 4–6 mm long, erect-spreading when wet, erect-falcate when dry, concave below, tubulose above, broadly lanceolate, apex short-acuminate; margins entire or toothed at apex; costa percurrent, 5/8–7/8 the leaf width at base, dorsal surface smooth or mammillose, in cross section with enlarged ventral hyalocysts, large, well developed, pentagonal-shaped guide cells, dorsal stereid band absent, cells below the guide cells enlarged, thin-walled at the margins, thick-walled near the center of the costa; upper cells quadrate to oblong, incrassate, not porose; basal cells long-rectangular, laxly thin-walled, hyaline, those at the basal margin laxly rectangular to linear, forming a distinct border; alar cells variously developed, at times hyaline and weakly developed at other times well developed, brownish red. Seta 5–7 mm long, yellow to reddish brown; capsules erect to slightly curved, striate when dry, 1.5 mm long; opercula 1 mm long. Calyptrae 2 mm long, ciliate at base. Spores 10–15 µm.