皱叶毛口藓

Didymodon crispulus (Bruch in F. A. Müll.) Wils. in Hook., Brit. Fl. (ed. 4) 2: 30. 1833. Mollia crispula (Bruch in F. A. Müll.) Lindb., Musci Scand. 21. 1879. Tortella crispula (Bruch in F. A. Müll.) Jens., Danmarks Mosser 2: 321. 1923. Barbula flavicaulis C. Müll., Nuovo Giorn. Bot. Ital., n. ser. 4: 258. 1897. Type. China: Shaanxi (Schen-si), Lao-y-san, P. J. Giraldi 1384 (isotype H).

Plants small to medium-sized, 10–30 mm high, yellowish green to light brown, in dense tufts. Stems erect, densely foliate, simple or irregularly branched. Leaves crisped when dry, erect-spreading when moist, narrowly lanceolate, acute or acuminate, upper lamina broadly channeled or cucullate, weakly sheathing at base; margins entire, somewhat incurved distally or wavy; costa stout, excurrent as a short awn; upper leaf cells rounded-quadrate, moderately thick-walled, green and obscure, each cell with several large, circular papillae on both surfaces; basal cells slightly elongate, irregularly rectangular, thin-walled, smooth. Dioicous. Setae 10–15 mm long, reddish; capsules erect, short-cylindrical; annuli differentiated, of 3–5 rows of vesiculose cells, persistent; peristome teeth erect, linear, 2-divided, papillose; opercula conic-rostrate, with a long, oblique beak. Spores reddish brown, coarsely papillose.

Type. Europe.

Chinese specimens examined: FUJIAN: Jian-ou Co., D.-K. Li 19173 (HKAS, SHM). GUANGXI: Long-sheng Co., J.-M. Jin 530 (PE). JIANGSU: Bao-hua Shan (Mt.), M. Zang 1004 (HKAS); Yi-xing Co., M. Zang 4 (HKAS). JIANGXI: Lu Shan (Mt.), X.-X. Zhong 366 (HKAS, PE). JILIN: Ji-an Co., C. Gao 7852 (IFSBH). LIAONING: Feng- cheng Co., C. Gao 8475 (HKAS, IFSBH); Kuan-dian Co., C. Gao 1098 (HKAS, IFSBH). NEI MONGOL: Da-qing Shan (Mt.), Z.-G. Tong 1562 (PE). SHAANXI: Hu Co., P. J. Giraldi 1386 (H). SHANGHAI: Chuan-sha Co., S.-M. Xu 264 (PE). SICHUAN: Nan-chong City, Nanshi 42 (PE). YUNNAN: Kun-ming City, W.-X. Xu s.n. (HYUB). ZHEJIANG: Sui-chang Co., R.-L. Hong 1381 (HSNU); western Tian-mu Shan (Mt.), Y.-F. Wang 350 (HSNU).

Habitat: on rocks, thin soil over rocks, or on forest ground; Distribution: China, Korea, Japan, Russia, Europe, north Africa, and North America.

Illustrations: C. Gao (ed.) 1996 (Pl. 56, figs. 16, 17).