狭叶链齿藓

Tortula cernua (Hüb.) Lindb., Musci Scand. 20. 1879.

Plants small, ca. 4 mm high, dull green to yellowish green, in loose tufts. Stems simple, densely radiculose below. Leaves oblong-ovate to ovate-lanceolate, 2–3 mm x 0.5–0.7 mm, gradually acute to shortly acuminate or cuspidate at the apex; margins revolute in the lower half, plane above, entire near the base, crenulate to serrulate near the apex, not bordered or indistinctly bordered by somewhat elongate cells, yellowish; costa slender, ending at the apex; upper cells rounded quadrate to hexagonal, thin-walled, lightly papillose, with a few circular or C-shaped papillae; basal cells elongate, lax, hyaline. Setae slender, 1.5–2.0 cm long; capsules ovoid to oblong-ovoid, asymmetrical, suberect to horizontal.

Type. Europe.

Chinese specimens examined: GUANGDONG: Le-chang Co., L. Zhang 715 (HKAS). JIANGSU: Chang-shu Co., D.-K. Li 17535 (HKAS, SHM). XIZANG: Ban-ge Co., B.-S. Li CT13 (HKAS, PE). YUNNAN: De-qing Co., X.-J. Li 2072 (HKAS); Song-ming Co., Koponen 37853 (H, HKAS).

Habitat: on soil on forest ground; Distribution: China, central Asia, Russia, Europe, and North America.

Illustrations: C. Gao (ed.) 1996 (Pl. 80, figs. 5–8).