19. Didymodon vinealis (Brid.) R.H. Zander 土生对齿藓 tu-sheng dui-chi xian
Phytologia 41: 25. 1978. Barbula vinealis Brid., Bryol. Univ. 1: 830. 1827. Type. Europe.
Barbula ellipsithecia Müll. Hal., Nuovo Giorn. Bot. Ital., n. ser. 4: 258. 1897. Type. China: Shaanxi (Schen-si), Lao-y-san, Mar. 1896, P. J. Giraldi 1387 (isotype H).
Barbula schensiana Müll. Hal., Nuovo Giorn. Bot. Ital., n. ser. 3: 101. 1896. Type. China: Shaanxi (Schen-si), Iu-kia-pou, Dec. 1894, P. J. Giraldi 868 (isotype H).
Barbula schensiana var. tenuissima Müll. Hal., Nuovo Giorn. Bot. Ital., n. ser. 3: 102. 1896. Type. China: Shaanxi (Schen-si), Si-ku-tziu-san, P. J. Giraldi s.n.
Barbula subcontorta Broth., Akad. Wiss. Wien Sitzungsber., Math.-Naturwiss. Kl., Abt. 1, 133: 565. 1924. Type. China: Yunnan, Yünnanfu, Handel-Mazzetti 317 (holotype H). Synonymized by Sollman (1983).
Plants small to medium-sized, 10–20 mm high, bright green to yellowish green, in loose or dense tufts. Stems erect, simple, rarely branched, radiculose at the base. Leaves contorted when dry, widely spreading to somewhat squarrose when moist, triangular- to ovate-lanceolate, gradually acuminate, sometimes plicate in the lower half; margins entire, revolute; costa stout, percurrent to shortly excurrent, brown to reddish brown; upper leaf cells irregularly rounded hexagonal, thick-walled, pluripapillose; basal cells slightly longer. Setae slender, reddish; capsules erect, cylindrical; peristome teeth linear-lanceolate, twisted counterclockwise once.