3. Camptothecium Schimp. in B.S.G. 斜蒴藓属 xie shuo xian shu
Bryol. Eur. 6: 31. 1853. Hypnum subgen. Camptothecium (Schimp.) Hobk., Syn. Brit. Mosses 147. 1873. Hypnum sect. Camptothecium (Schimp.) Lesq., Mem. Calif. Acad. Sci. 132. 1868.
Plants medium-sized to rather large, green or yellowish green, glossy, in dense mats. Stems prostrate or ascending, irregularly branched; branches more or less julaceous, attenuate at tips. Stem and branch leaves more or less similar, or slightly differentiated, ovate-lanceolate or triangular-lanceolate, mostly plicate, slenderly acuminate at apex; margins entire below, serrulate above; costae single, percurrent; median leaf cells linear; alar cells quadrate or rounded-quadrate, not particularly thick-walled; basal juxtacostal cells not pitted. Dioicous. Inner perichaetial leaves larger, piliferous. Setae elongate, roughened, slightly twisted; capsules inclined to horizontal, sometimes arcuate, elongate-ovoid to cylindrical; opercula shortly conic-rostrate; annuli developed; exostome teeth narrowly lanceolate, trabeculate; endostome segments as long as exostome teeth, keeled, perforate; basal membrane low; cilia nodulose. Calyptrae cucullate, smooth. Spores yellowish brown, papillose.