1. Giraldiella levieriC. Müll. 丝灰藓 si hui xian
Nuovo Giorn. Bot. Ital., n.s., 5: 192. 1898. Pylaisia levieri (C. Müll.) Arikawa, J. Hattori Bot. Lab. 95: 102. 2004. Type: China: Shaanxi (Schen-si), in monte Kuan-tou-san (Mt.), Nov. 1896, J. Giraldi s.n.
Macrohymenium sinense Thér., Bull. Acad. Int. Géogr. Bot. 19: 20. 1909. Type: China: Shaanxi, Mt. Guangtou (Kuan-tou-san), Levier 2006 (isotype FI). Synonymized by Eakin 1976.
Plants rather robust, green, glossy. Stems prostrate, irregularly branched; branches short, usually dense, erect or ascending, leafy branches more or less julaceous, rounded obtuse at tips. Leaves multi-seriate, appressed when dry, somewhat secund toward apex, erectopatent when moist, oblong-elliptic, 2.2–2.5 mm × 0.5–0.8 mm, strongly concave, gradually acuminate and shortly piliferous at apex; leaf margins entire, slightly incurved at base; costae double, very short; leaf cells linear-rhomboidal, 85–105 µm × 6–11 µm; alar cells quadrate, hyaline. Autoicous. Inner perichaetial leaves erect, somewhat sheathing at base, slenderly piliferous toward apex, margins entire. Setae slender, erect, reddish, flexuous above when dry; capsules erect or suberect, oblong-ellipsoidal, symmetric, gradually narrowed near base, with indistinct longitudinal ridges when dry; opercula conic, obliquely rostrate; annuli not developed; peristome double; exostome teeth narrowly lanceolate, 31–39 µm, yellowish brown, not cross-striolate on the dorsal surface, densely papillose above, with low and dense trabeculae on the inner surface; endostome segments slenderly lanceolate, pale yellowish, distinctly longer than the teeth, 41–45 µm long, densely papillose, perforate; basal membrane high; cilia single. Calyptrae not seen. Spores small, yellowish, 21–25 µm in diameter, densely minute-papillose.