6. Homalothecium Schimp. in B.S.G. 同蒴藓属 tong shuo xian shu
Bryol. Eur. 5: 91. 1851. Isothecium subgen. Homalothecium (Schimp.) Boulay, Musc. France, Mousses 140. 1884.
Plants slender to rather robust, green or yellowish brown, mostly glossy, in dense mats. Stems prostrate, densely irregularly to subpinnately branched, branches curved or ascending, rhizoids sparse; pseudoparaphyllia often present. Leaves erect-appressed or imbricate, sometimes secund when dry, mostly narrowly ovate-lanceolate to lanceolate, slenderly or shortly acuminate, usually 2–4-plicate; margins entire or serrulate throughout; costae extending to ca. 2/3 the leaf length; median leaf cells linear-rhomboidal or linear, smooth or sometimes slightly prorate; basal cells shorter, broader, yellowish, pitted; alar cells in a very small group, quadrate or shortly rectangular. Dioicous. Perichaetial leaves triangularly lanceolate. Setae elongate, reddish or yellowish brown, more or less roughened, twisted when dry; capsules erect, symmetric, or inclined, curved, elongate-ovoid or cylindrical; opercula obliquely long conic-rostrate; annuli developed; exostome teeth narrowly lanceolate, cross-striolate at base, bordered, trabeculate at dorsal surface; endostome segments keeled, perforate; basal membrane low or moderately high; cilia present, nodulose, or absent. Calyptrae cucullate, smooth or hairy. Spores spherical, usually papillose.