粗叶青毛藓

Dicranodontium aristatum Schimp., Syn. Musc. Eur. 695. 1860. Dicranodontium capillifolium (Dix.) Takaki, J. Hattori Bot. Lab. 31: 292. 1968. Brothera capillifolia Dix., J. Bombay Nat. Hist. Soc. 39: 774. 1937. Synonymized by Frahm (1997).

Plants small to rather large, up to 5 cm high, yellowish green, in weakly silky, loose or dense tufts. Stems erect or ascending, somewhat flexuose, unbranched or sparsely branched, radiculose below; central strand present. Leaves up to 7 mm long, homomallous, often deciduous, flexuose or falcate when dry, erect-spreading when moist, upper ones usually falcate-secund, abruptly narrowed from an ovate, convolute base to a very long, roughened, setaceous apex or often in semi-canaliculate awn; margins distinctly serrulate at shoulder, sometimes nearly to the base, often dentate near the apex; costa occupying ¼ – 1/3 the leaf base width, long-excurrent, often spinulose at tips, with several dentate ridges at back, occasionally nearly smooth; upper cells above the shoulders rectangular to linear, smooth or nearly so; upper basal cells in the sheathing base rectangular to linear, 30–50 µm × 10–20 µm, firm-walled; lower basal cells becoming broadly rectangular close to the costa, narrower near the margins, forming an indistinct marginal band; alar cells often inflated, broadly rectangular to subquadrate, 30–60µm × 20–30 µm, thin-walled, hyaline, fragile, occasionally forming indistinct auricles. Dioicous. Perichaetial leaves not much differentiated. Setae up to 1 cm long, yellowish, strongly flexuose when dry, cygneous when moist; capsules cylindric, 0.6–1.0 mm × 0.4–0.5 mm, brownish; opercula long-rostrate; annuli absent; peristome teeth lanceolate, ca. 0.3 mm long, divided unequally to the middle. Spores not seen.

Syntypes. India: Sikkim, J. D. Hooker 18, 29.

Chinese specimens examined: GUANGXI: Xian-an Co., S.-S. Hu 80112 (MO). HAINAN: Wuzhi Shan (Mt.), Z. Huang 35603 (IFSBH). SICHUAN: Dao-cheng Co., M.-Z. Wang 81405 (c) (IFSBH, PE); Mu-li Co., C. Gao 20281, 20385 (IFSBH); Tian-quan Co., C. Gao 17952 (IFSBH); Ya-jiang Co., S. He 31901 (MO). TAIWAN: Ping-dong Co., C.-C. Chuang 1535, 1536 (UBC). XIZANG: Cha-yu Co., S.-G. Wu 1088 (IFSBH, KUN); Mi-lin Co., M. Zang 1926 (KUN); Mo-tuo Co., Y.-G. Su 4245, 4472 (IFSBH, KUN); Mt. Everest, X.-G. Wang 26, 100 (MO). YUNNAN: Gong-shan Co., M.-Z. Wang 8109 (IFSBH, PE); Jing-dong Co., J.-K. Zhang 556 (IFSBH, YUKU); Mang-kang Co., Handel-Mazzetti 8347, 9247 (H); Wen-shan Co., Y.-H. Liu 22389 (KUN); Yi-liang Co., X.-J. Li 4370 (IFSBH, KUN).

Habitat: on rocks or rotten wood in subalpine forests; Distrobution: China, Japan, Nepal, India, Europe, and North America.

Illustrations: C. Gao (ed.) 1994 (Pl. 77, figs. 1–8).