斜叶芦荟藓

Aloina rigida (Hedw.) Limpr. var. obliquifolia (C. Müll.) Delgadillo, Bryologist 78: 264. 1975.

Plants very small, 1.0–3.0(–4.0) mm high. Stems simple, erect, loosely foliate. Leaves ca. 2 mm long, incurved or curved-contorted when dry, broadly ovate to ligulate, concave, gradually narrowed toward the apex, mucronate and open at the apex; margins nearly entire, incurved; costa excurrent, ending in a reddish awn; costal green filaments branched, 2–6 cells high, thin-walled, terminal cells conical; upper leaf cells transversely rectangular or elliptic, thick-walled; basal cells rectangular, thin-walled. Dioicous. Setae 10–15(–22) mm long, red below, yellowish brown above; capsules erect, yellowish brown, ovoid-cylindrical, 1.5–2.0(–2.4) mm long; annuli well developed, consisting of 1–2(–3) rows of cells, sometimes deciduous when mature; peristome teeth filiform, red, strongly twisted 2–3 times counterclockwise; opercula conical, rostrate. Spores spherical, nearly smooth.

Type. China: Shaanxi (Schen-si), in monte Tui-kio-san, 1896, Giraldi s.n. (isotype H).

Chinese specimens examined: NEI MONGOL: A-la-shan Zuo-qi, He-lan Shan (Mt.), Z.-G. Tong 2127 (PE); Da-qing Shan (Mt.), Z.-G. Tong 1566, 1755 (PE); Hohhot City, Z.-G. Tong 2555 (MO, PE). QINGHAI: Cheng-duo Co., B.-C. Tan 95-1696 (FH, MO). SHAANXI: Han-zhong, Giraldi 1307, 1813 (H). SICHUAN: Mao-wen Co., Redfearn 35568 (MO). XIZANG: Jia-li valley, M. Zang 975, 976 (HKAS); Long-zi Co., M. Zang 1352 (HKAS). YUNNAN: Li-jiang Co., W.-X. Xu 3 (YUKU).

Habitat: on soil in forests or soil walls; Distribution: endemic to China.

Illustrations: Pl. 106, figs. 1–4.