4. Cirriphyllum Grout 毛尖藓属 mao jian xian
Bull. Torrey Bot. Club 25: 222. 1898. Eurhynchium subgen. Cirriphyllum (Grout) Aman, Fl. Mouss. Suisse 2: 315. 1918.
Paramyurium (Limpr.) Warnst., Krypt.-Fl. Brandenburg, Laubm. 763. 1905. Eurhynchium subgen. Paramyurium Limpr., Laubm. Deutschl. 3: 173. 1896.
Plants slender to somewhat robust, pale yellowish green or dark green, often glossy, in large mats. Stems prostrate or somewhat ascending, irregularly or subpinnately branched, with erect, more or less julaceous branches. Stem and branch leaves similar, or somewhat differentiated, imbricate when dry, erect-spreading when moist, oblong-ovate or elliptical, cochleariform, sometimes narrowly ovate-lanceolate, strongly concave, plane or plicate, often abruptly narrowed to a slender, often piliform apex, more or less decurrent at base; margins plane or incurved, entire below, serrulate above or near apex; costae single, reaching ca. 1/2–2/3 the leaf length; median leaf cells linear, smooth; alar cells quadrate, shortly rectangular, in a small group. Dioicous. Perichaetial leaves sheathing at base, abruptly narrowed to a slender apex. Setae elongate, mostly roughened; capsules inclined to horizontal, ellipsoidal to shortly cylindrical, asymmetric; opercula conic, short- to long-rostrate; annuli developed; peristome double; exostome teeth lanceolate, papillose above, cross-striolate below, trabeculate on ventral surface; endostome segments keeled, perforate; basal membrane high, papillose; cilia present, nodulose. Calyptrae cucullate, smooth. Spores spherical, nearly smooth or finely papillose.