1. Clastobryum glabrescens(Iwats.) B. C. Tan, Iwats. & Norris 三列疣胞藓 san lie you bao xian
Hikobia 11: 151. 1992. Tristichella glabrescens Iwats., Bull. Natl. Sci. Mus., Tokyo, B, 3: 17. f. 2–3. 1977. Type: Japan.
Plants in mats, frequently epiphytic on tree branches. Main stems prostrate, 1–2 cm long, with erect branches, ca. 1 cm long. Leaves strongly 3-ranked, ovate-lanceolate, 1.0–1.5 mm long, cybiform, strongly concave in upper half of lamina, acuminate at apex; leaf margins serrulate in the upper portion, serrate below; leaf cells linear, 60–80 mm long, smooth, sometimes prorate due to projection of the cell ends, slightly pitted, gradually becoming shorter toward margins; alar cells oval, thick-walled, colored. Propagula present on the upper branches. Autoicous. Inner perichaetial leaves, ovate-lanceolate, margins strongly toothed. Setae erect, 1–2 mm long, smooth; capsules ovoid to cylindrical, ca. 2 mm long; opercula shortly rostrate.