大叶石灰藓

Plants rather large, to 50 mm high, yellowish green, in loose tufts. Stems erect, thick, mostly branched, radiculose at the base. Leaves contorted when dry, erect-spreading when moist, ovate-lanceolate, broader at the base, gradually acuminate; margins entire, plane in the upper half, revolute in the lower half; costa stout, yellowish brown, usually shortly excurrent; upper leaf cells quadrate to hexagonal, ca. 10–12 µm wide, thin-walled, papillose; basal cells rectangular, somewhat hyaline. Gemmae usually present in leaf axils, consisting of 8–12 cells, spindle-shaped or filiform. Sporophytes not seen.

Type. China: Shaanxi (Schen-si), Lao-y-huo, Schan-gen-ze, March 1897, P. J. Giraldi 1825 (isotype H).

Specimen examined: SHAANXI: Hu Co., M.-X. Zhang s.n. (WUG).

Habitat: on rocks or soil in shade; Distribution: endemic to China.

Illustrations: Pl. 124, figs. 4–5.