1. Leiodontium gracile Broth. 平齿藓 pin chi xian
Symb. Sin. 4: 127. 1929. Type: China. Yunnan, Mekong, Handel-Mazzetti 8449.
Plants slender, somewhat soft, yellowish, glossy, in dense tufts. Stems prostrate, with brownish rhizoids, branches dense, ascending, ca. 5 cm long, terete, simple, blunt at apex. Leaves imbricate, concave, lanceolate, slenderly acuminate to filiform at apex, ca. 1 mm long; margins recurved below, serrulate nearly throughout; costae absent; leaf cells linear, smooth; basal cells shorter, lax; alar cells slightly differentiated. Dioicous. Inner perichaetial leaves erect, sheathing at base, slenderly acuminate, serrulate at apex. Setae ca. 2 cm long, slender, pale reddish, smooth; capsules erect, small, ovoid, dark brown, exothecial cells lax, rounded hexagonal, thin-walled; peristome the same as the genus. Spores 10–15 µm in diameter, brownish, smooth.