1. Indusiella thianschanica Broth. & C. Müll. in Broth. 旱藓 han xian
Bot. Centralbl. 75(11): 322. 1898. Type. Russia (former U.S.S.R.): Tyanshan, vicinity of Issykkul; Alpes Alexandri, Kaschkara River valley, 1 June 1896, Brotherus s.n. (lectotype H, designated by Murray 1984, not seen).
Indusiella andersonii Delgadillo, Bryologist 79: 99. 1976. Synonymized by Murray 1984.
Plants small, 7–9 mm high, blackish green above, brownish below, in dense cushions. Stems erect, branched above, with a well developed central strand in cross section. Leaves rigid, fragile, imbricate, closely appressed when dry, erect-spreading when moist, broadly ovate, 0.9–1.1 mm long, broadly sheathing at base, abruptly and strongly enrolled in the upper part, cucullate and obtuse at apex; margins entire, plane at sheathing base, spirally inrolled above; costa single, strong, percurrent, up to 1/4–1/3 the leaf width at base, more or less flat; upper leaf cells bistratose, dorsal cells small, irregularly quadrate, ca. 10–12 µm wide, with rather thick walls, ventral cells larger, irregularly quadrate to short-rectangular, 10–18 µm × 8–10 µm, with very thin walls; basal cells large, quadrate to rectangular, 15–40 µm × 11–15 µm, somewhat hyaline, with slightly thickened walls. Monoicous. Perichaetial leaves similar to the upper stem leaves. Setae straight, short, 0.7–1.1 mm long; capsules erect, exserted above the perichaetial leaves, hemispherical to broadly ovoid, 0.6–0.7 mm long, smooth; exothecial cells irregularly rectangular, thick-walled; stomata restricted to the base of urns; annuli differentiated, consisting of two rows of elongate, thick-walled cells; opercula conic, with a short to long, obtuse beak; peristome teeth lanceolate, irregularly divided into 2–3 filiform segments, sometimes irregularly perforate in the middle, densely coarsely papillose throughout on outer and inner surfaces. Calyptrae large, campanulate, covering most of the capsule, not hairy, deeply and longitudinally plicate, divided into narrow lobes at base. Spores spherical, 9–12 µm in diameter, yellowish brown, more or less granulose.