1. Barbula chenia Redfearn & B. C. Tan   钝叶扭口藓 dun-ye niu-kou xian

Trop. Bryol. 10: 65. 1995. Trichostomum obtusifolium Broth., Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1, 131: 210. 1923, hom. illeg. Oxystegus obtusifolius Hilp., Beih. Bot. Centralbl. 50(2): 667. 1933. Streblotrichum obtusifolium (Hilp.) P.-C. Chen, Hedwigia 80: 220. 1941. Type. China: Hunan, Chang-sha (Tschangscha), Yo-lu-schan, Handel-Mazzetti 11435 (holotype H).

Barbula brevicaulis Broth., Symb. Sin. 4: 42. 1929, hom. illeg. Barbula yuennanensis Broth., Sitzungsber. Kaiserl. Akad. Wiss. Math.-Naturwiss. Cl., 133: 566. 1924, hom. illeg. Type. China: Yunnan, Kun-ming City (Yünnanfu), Handel-Mazzetti 71 (holotype H).

 

Plants very small, ca. 7 mm high, yellowish green, in loose tufts. Stems erect, simple, rarely branched, often radiculose at the base. Leaves contorted when dry, erect-spreading when moist, narrowly ovate-lanceolate to narrow-ligulate, rounded obtuse at apex; margins entire, undulate; costa stout, percurrent; upper leaf cells small, rounded-hexagonal, rather thick-walled, obscure, coarsely multi-papillose; basal cells differentiated, often larger, rectangular, smooth, hyaline, sometimes forming a V-shaped base. Dioicous. Perichaetial leaves enlarged, sheathing at base. Setae ca. 20 mm long, reddish, smooth; capsules erect, cylindrical; peristome filiform, twisted, densely papillose; opercula conic-rostrate with a long oblique beak. Spores yellowish, smooth.