纽藓

Barbula subtortuosa C. Müll., Nuovo Giorn. Bot. Ital., n. ser. 3: 100. 1896. Type. China: Shaanxi (Schen-si), Thae-pei-san, 1894, P. J. Giraldi 848 (isotype H).

Plants medium-sized to rather large, 1–4(–5) cm high, green to yellowish green, in dense tufts. Stems erect, usually branched. Leaves often crowded, contorted-curved when dry, flexuous-spreading when moist, linear-lanceolate to narrowly lanceolate, often channeled above, slenderly acute, somewhat sheathing at base; margins plane or somewhat undulate or narrowly incurved, entire to crenulate with projecting papillae; costa more or less excurrent, sometimes ending in a short awn; upper leaf cells quadrate to hexagonal, unistratose, pluripapillose, with simple papillae; basal cells often sharply differentiated, rectangular, smooth, forming a V-shaped base. Dioicous. Sporophytes not seen.

Type. Europe.

Chinese specimens examined: ANHUI: Huo-shan Co., K.-H. Cai 1704 (HSNU). FUJIAN: Wuyi Shan (Mt.), D.-K. Li 14956 (HKAS). GANSU: Qi-lian Shan (Mt.), D.-Z. Zhuo 761 (PE). GUANGDONG: Le-chang Co., G.-Q. Zeng 583 (HKAS); Yang-shan Co., G.-Q. Zeng 331 (HKAS). HENAN: Luan-chuan Co., D.-Z. Zhuo 3035 (PE); Song Co., J.-X. Luo 385 (MO, PE); Xi-xia Co., J.-X. Luo 272a (PE). HUBEI: Sheng-nong-jia (Mt.), K.-Y. Guan 802770 (HKAS). JIANGSU: Nan-jing City, M. Zang 5601 (HKAS). JIANGXI: Jing-gang Shan (Mt.), D.-K. Li 17231 (HKAS, SHM). NINGXIA: He-lan Shan (Mt.), Z.-G. Tong 1211 (PE). SHAANXI: Qing-ling (Mt.), Q. Huang 1426 (MO, PE). SHANXI: Tai-gu Co., Y.-J. Ling 35 (PE). SICHUAN: Ba-tang Co., S. He 31489 (MO); Ma-er-kang Co., S. He 31239a (MO); Nan-ping Co., Allen 7210 (MO); Song-pan Co., Allen 7074 (MO); Tian-quan Co., Z.-L. Wu 12351 (HKAS); Wen-chuan Co., Allen 6708 (MO). TAIWAN: Tai-pei Co., Koponen 17684 (H, HKAS). XINJIANG: He-jing Co., S. He 951193 (MO); Tian Shan (Mt.), Exped. Team 25 (PE). XIZANG: Chia-yu Co., S.-G. Wu 1092c (HKAS); Mo-tuo Co., Y.-G. Su 2341 (HKAS); Ya-dong Co., M. Zang 648 (HKAS). YUNNAN: Kun-ming City, Koponen 37447 (H, HKAS); Lu-xi Co., X.-J. Li 55 (HKAS); Meng-zi Co., X.-J. Li 7501 (HKAS); Yuan-yang Co., M. Zang 753 (HKAS); Zhong-dian Co., Handel-Mazzetti 4739 (H). ZHEJIANG: Sui-chang Co., R.-L. Hu 703 (HSNU).

Habitat: on wet rocks or thin soil over rocks; also on alpine bogs or on tree trunks; Distribution: China, Japan, Nepal, India, Russia, Europe, northern Africa, North and South America.

Illustrations: C. Gao (ed.) 1996 (Pl. 52, figs. 12–16).