Dicranum atrovirens (De Not.) C. Müll., Syn. Musc. Frond. 1: 414. 1848. Campylopus fuscoviridis (Card.) Dix. & Thér. ex Hong & Ando, Biol. Inst. Cath. Med. Coll. Seoul Korea 3: 373. 1959. Campylopus japonicus Broth. var. fuscoviridis Card., Beih. Bot. Centralbl. 17: 7. 1904.

Plants small to relatively large, sometimes slenderly long, 1–3(–5) cm high, sordid green or olive green above, dark brown below, in dense tufts. Stems erect, or ascending, simple or branched, often curved to one side, radiculose below. Leaves erect to appressed when dry, erect-spreading to homomallous when moist, 4–7 mm long, lanceolate, gradually tapered to a concolorous or hyaline hairpoint; margins plane or somewhat involute in the middle part, entire; costa brownish, occupying ½ the leaf base width, weakly to distinctly ridged at back in the upper part, ending in a hyaline hairpoint, with dorsal stereid band in transverse section; upper cells elongate-oval, strongly incrassate, somewhat porose; basal cells quadrate to short-rectangular, thick-walled; alar cells forming well marked auricles, inflated, hexagonal, thin-walled, brownish. Dioicous. Setae ca. 7 mm long, straight when dry, cygneous when moist; capsule ovoid to short-cylindric, ca. 0.8 mm wide; peristome teeth divided to the middle, vertically striate below. Spores not seen.

Type. Italy: Lago Maggiore, De Notaris s.n.

Chinese specimens examined: ANHUI: Huang Shan (Mt.), P.-C. Chen 6757, 7180 (PE), D.-K. Li 493 (SHM). FUJIAN: De-hua Co., P.-Z. Zheng 853 (IBSC); Nanping City, C. Gao & Z.-W. Ao 25546 (IFSBH, MO); Tong-an Co., P.-J. Lin 2370 (IBSC); Wuyi Shan (Mt.), P.-C. Chen 973 (PE). GUANGDONG: Ru-yuan Co., P.-J. Lin 1325 (IBSC). GUANGXI: Shang-si Co., C. Gao 2146, 2255 (IFSBH); Xing-an Co., C. Gao & G.-C. Zhang 1512 (IFSBH). GUIZHOU: Jiang-kou Co., C. Gao & J.-Y. Feng 32151 (IFSBH). HUNAN: Liu-yang Co., C. Gao et al. 381 (IFSBH). JIANGXI: Jinggang Shan (Mt.), D.-K. Li 16708, 16768 (SHM); Lu Shan (Mt.), R.-L. Hu 10 (HSNU). SHAANXI: Shi-quan Co., J.-Q. Xing 10290 (IFSBH). XIZANG: Nie-la-mu Co., S.-K. Chen 180a (KUN). YUNNAN: Lu-jiang Co., Yunnan Univ. Dept. Biol 87 (YUKU). ZHEJIANG: Sui-chang Co., Z.-L. Liu 404 (IFSBH); west Tian-mu Shan (Mt.), Y.-F. Wang 326 (MO).

Habitat: on soil or rocks; Distribution: China, Nepal, Japan, Europe, and North America.

Illustrations: C. Gao (ed.) 1994 (Pl. 69, figs. 1–8).