小对叶藓

Swartzia hagenii (Ryan ex Philib.) Möll., Bot. Not. 1907: 142. 1907. Distichium inclinatum ssp. hagenii (Ryan ex Philib.) Amann, Fl. Mouss. Suisse 2: 87. 1919. Distichium inclinatum var. hagenii (Ryan ex Philib.) Mönk., Lanbm. Eur. 161. 1927. Distichium macrosporum C. Gao in X.-J. Li (ed.), Bryofl. Xizang. 17. 1985. Type. China: Xizang, Ji-long Co., G.-C. Zhang 801 (holotype IFSBH).

Plants minute to small, 0.5–1.0 cm high, yellowish green, not shiny, in dense tufts. Stems erect, often simple, rarely branched, radiculose at base. Leaves distichous, 2.5–3.0 mm long, abruptly narrowed from an oblong-ovate, sheathing base to a short, setaceous point, the acumina ½ to as long as the sheathing base; margins plane, crenulate above the shoulder; costa stout, shortly excurrent, ending in an awn; upper cells quadrate or irregularly hexagonal; basal cells short-rectangular, less than 25 µm long, moderately thick-walled. Autoicous or dioicous. Setae straight, 3–10 mm long, yellowish brown; capsules erect to suberect, oblong-ovoid to short-cylindric, symmetric to slightly asymmetric; opercula conic; annuli differentiated, in 2 rows of large cells, deciduous; peristome teeth 3–5 divided, reddish brown. Spores 30–60 µm in diameter, coarsely papillose.

Type. Norway: M. Ryan s.n.

Chinese specimens examined: GANSU: Qilian Shan (Mt.), Z.-D. Zhuo 761-64 (MO). XINJIANG: Bogeda Shan (Mt.), J.-C. Zhao 2969 (XJU). XIZANG: Gong-bu-jiang-da Co., M. Zang 5246 (KUN); Zhong-ba-cuo-la Shan (Mt.), D.-D. Tao 21040 (IFSBH).

Habitat: on soil or rocks in alpine regions; Distribution: China, Russia, Europe, and North America.

Illustrations: X.-J. Li (ed.) 1985 (Pl. 7, figs. 10–16).