2. Dicranoweisia crispula (Hedw.) Lindb. in Milde, Bryol. Siles. 49. 1869; Weissia crispula Hedw., Sp. Musc. Frond. 68. pl. 12, f. 1–6. 1801.
Plants slender, up to 1.1 cm high, dull, yellowish green or sometimes blackish, in tufts. Stems erect, often branched, radiculose at base. Leaves up to 3.5 mm long, strongly crispate and incurved when dry, erect spreading and flexuose, sometimes secund when moist, oblong-lanceolate and concave at the base, rather gradually narrowed to a long, slender, subtubulose acumen; margins plane, entire, unistratose; costa percurrent to shortly excurrent, with stereid bands in transverse section; upper cells irregularly quadrate, ca. 7–10 µm wide, thick-walled, often appearing papillose because of longitudinal ridges (striae); basal cells elongate, rectangular, 20–35 µm × 8–10 µm, thin- to thick-walled; alar cells well differentiated in a small group, yellowish or brownish. Autoicous. Outer perichaetial leaves rather short-acuminate, the inner ones with a long sheathing and convolute base and a shortly attenuate or obtuse apex. Setae straight, 7–14 mm long, yellowish to brownish; capsules elongate-ovoid to cylindric, sometimes with a short neck, finely wrinkled when dry; opercula oblong-rostrate, ca. 1 mm long; annuli none; peristome teeth brownish, undivided, distinctly papillose on both surfaces, sometimes papillae in vertical or oblique rows at the base, appearing striolate. Spores 12–18 µm in diameter, pale, smooth.
Type. Czech: Bohemia, Ludwig s.n.
Chinese specimens examined: ANHUI: Huang Shan (Mt.), P.-J. Lin & Z.-H. Li 89 (IBSC, IFSBH). JILIN: An-tuo Co., C. Gao 1048 (IFSBH); Wu-song Co., S.-E. Liu 1824 (IFSBH). JIANGXI: Lu Shan (Mt.), D.-K. Li 017387 (SHM). SICHUAN: A-ba Co., C.-Q. Li 56-731 (IFSBH); Li-xian Co., F.-L. Li 731 (IFSBH). XIZANG: Cha-yu Co., S.-G. Wu 1099(c) (IFSBH, KUN); Mo-tuo Co., Y.-G. Su 933(a) (IFSBH, PE). YUNNAN: Gong-shan Co., M.-Z. Wang 9406(b) (PE). ZHEJIANG: west Tian-mu Shan (Mt.), R.-L. Hu 53 (MO).
Habitat: on calcareous or siliceous rocks or boulders; Distribution: China, Korea, Japan, Russia, Europe, and North America.
Illustrations: C. Gao (ed.) 1994 (Pl. 97, figs. 6–10).