6. Hydrogonium inflexum (Dub.) P.-C. Chen, Hedwigia. 80:249. 1941; Tortula inflexa Duby in Moritzi, Syst. Verz. 133. 1846.
Barbula inflexa (Duby) C. Müll., Syn. Musc. Frond. 1: 605. 1849.
Plants medium-sized, to 30 mm high, dark green, in loose tufts. Stems erect, simple or branched, loosely foliate, radiculose at the base. Leaves contorted when dry, erect-spreading when moist, oblong-elliptic or ligulate, blunt to rounded-obtuse or weakly apiculate at the apex, distinctly plicate in the lower half; margins entire, plane; upper leaf cells quadrate to hexagonal, smooth or rarely mammillose; basal cells oblong, smooth, hyaline. Setae straight, 10–15 mm long, reddish; capsules cylindrical; opercula long conic-rostrate; peristome teeth linear, twisted twice counterclockwise, papillose, with a low basal membrane.
Type. Indonesia: Java, Zollinger 1603.
Chinese specimens examined: FUJIAN: Nan-qing Co., D.-K. Li 1454 (HKAS, SHM). GUANGDONG: Ding-hu Shan (Mt.), W.-L. Zhang 5, 6 (PE). XIZANG: Mo-tuo Co., Y.-G. Su 3796 (HKAS).
Habitat: on soil on moist slopes or on rocks near streams; Distribution: China and Indonesia.
Illustrations: Pl. 125, figs. 3–4.