2. Leskea Hedw. 薄罗藓属 bo-luo xian shu
Sp. Musc. Frond. 211. 1801.
Plants rather slender, dark green, dull. Stems creeping, sparsely radiculose, pinnately or subpinnately branched; branches short, ascending or erect; paraphyllia few, linear to shortly lanceolate, rarely lacking. Leaves appressed on stems when dry, erect-spreading when moist, sometimes slightly secund; cordate or ovate, slightly decurrent at base, gradually narrowed to a mucronate or acuminate apex, or sometimes blunt to acute at apex, usually slightly plicate; margins often recurved, entire or serrulate near apex; costa single, thick, strong, ending below apex; leaf cells thin-walled; upper cells rounded to hexagonal, unipapillose, rarely bipapillose or multipapillose; median cells rhomboidal; basal cells subquadrate; branch leaves smaller. Monoicous. Inner perichaetial leaves pale, sheathing at base, with either long or short apices, cells smooth. Setae slender, elongate; capsules erect, oblong-cylindrical, sometimes curved or pendent, exothecial cells thin-walled; annuli differentiated, deciduous; peristome double; exostome teeth pale yellow, linear, with a long acuminate apex, margins not differentiated, striate below, papillose above; endostome segments pale yellow, finely papillose, linear, folded, equal to or longer than teeth; basal membrane low; cilia rudimentary; opercula conic. Spores small, verrucose.