高领藓科 gao ling xian ke
by Wang Mei-zhi
Plants small to medium-sized, green, brownish green, or dark brown, in loose or dense mats, mostly on tree trunks. Stems erect or ascending, simple or branched; central strand present, with rhizoids at the base. Leaves appressed, flexuose or strongly curled when dry, erect-spreading when moist; lingulate, triangular-lanceolate, lanceolate or narrowly oblong, mostly keeled, abruptly or gradually acuminate, sheathing at the base; margins usually entire, slightly recurved below, sometimes bistratose; costae strong, single, reaching beyond mid-leaf or shortly excurrent; upper and median leaf cells subquadrate, hexagonal, elliptical or irregular, smooth, sometimes papillose or mammillose, mostly thick-walled, or with trigone-like thickening; basal cells rectangular, somewhat thinner-walled; alar cells not differentiated. Autoicous, rarely dioicous. Perichaetia often at branch tips. Perichaetial leaves large, often sheathing or involute, clasping the setae at the base, slenderly acuminate or blunt; costae slender. Setae short; capsules ovoid, oblong-ovoid or cylindrical, symmetric or somewhat asymmetric, usually erect; opercula conic at the base, long-rostrate; annuli somewhat differentiated; exothecial cells close to the mouth consisting of 2–8 rows of oval, hexagonal, subquadrate or oblate cells, thick-walled, other exothecial cells elongate; stomata present at the neck; peristome single, with 16 teeth, lanceolate, reddish brown or pale yellow, smooth or papillose. Calyptrae mitrate, plicate, smooth or sparsely hairy, often covering the entire capsule. Spores large, spherical, densely papillose.