Anoectangium wilmsianum (Müll.Hal.) Paris

Plants slender, frequently very tall, forming dense cushions, green to yellow-green; saxicolous or infrequently terricolous. Stems 5-20 mm tall, occasionally irregularly branched below, sparsely tomentose below; in section round to angular, central strand small, rarely blackish, inner cortical cells lax, outer cortical cells in 2 rows, stereids, reddish; axillary hairs of 7-8 cylindrical cells, hyaline throughout. Leaves crowded, incurved, twisted dry, patent wet; ligulate to lanceolate, high altitude specimens broader, ovate-lanceolate, 0.8-1.2 mm long; ventral surface deeply and narrowly grooved along costa; apex acute, mucronate by 1-3 smooth, translucent cells; base scarcely differentiated, frequently concave juxtacostally; margins plane, entire. Costa strong, percurrent; ventral superficial cells rectangular, smooth or rarely papillose, dorsal superficial cells long-rectangular, papillose; in section semicircular, lamina inserted ventrally, guide cells 2, exposed, ventral cells generally lacking, dorsal stereid band strong, 2-3 cells thick, dorsal surface cells substereids. Upper laminal cells rounded, quadrate to short-rectangular or triangular, incrassate, papillae low, blunt, scattered, 3-6 per cell; basal leaf cells quadrate marginally, papillose to near base, juxtacostally quadrate to rectangular, smooth. Dioicous. Perigonia lateral, gemmate; perichaetia on short lateral branches, leaves very distinct, oval to ovate, abruptly acuminate, 0.7-1.2 mm long, serrate at shoulders; laminal cells rectangular, smooth. Seta 4-7 mm long, yellow; capsule oval, 1.0-1.2 mm long, reddish yellow; peristome absent; operculum long-rostrate, 0.8 mm long; calyptra cucullate; spores round, 12-13 µm, spiculate.