9. Rhizomnium striatulum (Mitt.) T. Kop. 细枝毛灯藓 xi zhi mao deng xian
Ann. Bot. Fenn. 5: 143. 1968. Mnium striatulum Mitt., Trans. Linn. Soc. London, Bot. 3: 167. 1891. Type: Japan.
Mnium angustum Broth. in C. Müll., Gen. Musc. Frond. 135. 1900, nom. nud.
Plants small to medium-sized, in loose tufts. Stems erect, 1.5–2.0 cm high, sparsely foliate, with dense rhizoids at base. Leaves slightly crisped when dry, spreading when moist, obovate or elliptical, 4.5–5.0 mm × 2.5–3.0 mm, narrowed and not decurrent at base, broader above, rounded and apiculate at apex; margins entire, bordered by 3–5 rows of elongate-rhomboidal cells, usually reddish yellow at margins; costae percurrent; leaf cells rather small, rounded or rounded hexagonal, ca. 20–30 µm wide, cells walls thickened at corners. Dioicous. Setae ca. 3.0 cm long; capsules cylindrical, ca. 2.5 mm × 1.0 mm, pendulous; opercula conic, obliquely rostrate.