10. Bryum caespiticiumHedw. 丛生真藓 cong sheng zhen xian
Sp. Musc. Frond. 180. 1801. Hypnum caespiticium (Hedw.) Web. & Mohr, Index Mus. Pl. Crypt. 3. 1803. Type: Europe.
Bryum capitellatum C. Müll., Nuovo Giorn. Bot. Ital., n.s., 5: 164. 1898, hom. illeg. Type: China. Shaanxi (Schen-si), May 1896, Giraldi s.n.
Bryum sinensi-caespiticium C. Müll., Nuovo Giorn. Bot. Ital., n.s., 5: 165. 1898. Type: China. Shaanxi (Schen-si), Oct. 1896, Giraldi s.n.
Plants small, ca. 10 mm high, pale yellowish green, slightly glossy, densely caespitose. Stems erect, branched by innovations. Leaves appressed when dry, not at all twisted, oblong-ovate to elliptical, cucullate near apex; margins slightly recurved below mid-leaf, entire, borders differentiated; costae reddish at base, long-excurrent, ending in long awns; median leaf cells hexagonal, 35–55 µm × 10–14 µm, thin-walled, gradually becoming narrower close to margins; apical cells similar to the median ones; basal cells hexagonal. Dioicous. Setae dark brown, 15–25 mm long; capsules inclined when dry, pendulous when moist, shortly cylindrical to pyriform; neck thick, dark reddish brown; opercula conic, slenderly rostrate; endostome segments perforate; basal membrane ca. 1/2 the height of teeth; cilia long, nodose. Spores 10–15 µm in diameter.