10. Rhizomnium tuomikoskii T. Kop. 具丝毛灯藓 ju si mao deng xian
J. Hattori Bot. Lab. 34: 375. 1971. Type: Japan [Kyushu]. Miyazaki: Inotani, Sakatani, Nichinan-shi, 250 m, Iwatsuki & Mizutani 1966 (holotype H).
Plants small to medium-sized, in loose tufts. Stems erect, ca. 2.0 cm high, with many filamentous gemmae in the upper parts of stems, densely radiculose below. Leaves flexuous and undulate when dry, spreading or reflexed when moist, lower leaves smaller, ca. 5.0 mm × 3.5 mm, upper leaves larger, ca. 6.5 mm × 4.0 mm, obovate or broadly spathulate; margins entire, bordered by 2 rows of elongate cells; costae ending below the apex; median leaf cells regularly hexagonal, 85–100 µm × 70–90 µm, thin-walled, upper cells smaller, rounded-hexagonal, 40–50 µm × 35–45 µm. Dioicous. Inner perichaetial leaves small, narrowly spathulate, ca. 1.5 mm long. Setae solitary, ca. 3.5 cm long, yellowish brown; capsules ovoid-cylindrical, ca. 3.5 mm × 1.5 mm, horizontal. Spores irregularly rounded, 25–35 µm in diameter, minutely papillose.