1. Dicranella amplexans (Mitt.) Jaeg. 鞘叶小曲尾藓 qiao-ye xiao qu-wei xian.
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1870–71: 376. 1872. Leptotrichum amplexans Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 9. 1859. Type. Nepal: Wallich s.n.
Plants soft, small, 2–3 mm high, pale yellowish, gregarious or in loose tufts. Stems erect, simple. Leaves flexuose when dry, erect-patent to spreading when moist, lower leaves 0.8–1.0 mm long, distant, upper leaves up to 2.4 mm long, more crowded, abruptly narrowed from an ovate, concave, somewhat sheathing base to a long, subulate acumen, leaf base width ca. 1/6 the total leaf length; margins entire except sinuate at the apex; costa dark, occupying less than 1/4 the leaf base width; upper cells rectangular, 30–50 µm × 6–10 µm; basal cells elongate and wider, 40–60 µm × 8–20 µm, thin-walled. Monoicous. Perichaetial leaves erect, shorter, more clasping at base. Setae straight when wet, twisted when dry; capsules short-cylindric, 0.5–0.6 mm × 0.3–0.5 mm, without struma, smooth when dry; opercula conic-rostrate, slightly bent to one side, nearly as long as the urn; peristome teeth dicranoid. Spores 20–23 µm in diameter, brownish, warty.