2. Weissia breviseta (Thér.) P.-C. Chen 短柄小石藓 duan-bing xiao shi xian
Hedwigia 80: 165. 1941. Trichostomum brevisetum Thér., Ann. Cryptog. Exot. 5: 171. ic. 1932. Type. China: Fujian, Fuzhou City, Gushan (Mt.), H.-H. Chung 166.
Plants small, only 2–3 mm high, yellowish green, in dense tufts. Stems short, simple, densely foliate. Leaves often crowded at stem tips, contorted-curved when dry, spreading when moist, narrowly oblong-spatulate, 1.7–2.0 mm long, sheathing at base, upper lamina often channeled, sharply acute at apex; margins strongly incurved above the leaf base, entire; costa rather stout, usually shortly excurrent, ending in sharply mucronate tips; upper leaf cells quadrate to hexagonal, evenly thick-walled, papillose; basal cells sharply differentiated, rectangular, mostly thin-walled, smooth, hyaline. Autoicous. Setae ca. 5 mm long; capsules erect, cylindrical; peristome teeth erect, undivided, perforated, papillose.