13. Brachythecium glareosum (Spruce) Schimp. in B.S.G. 石地青藓 shi di qing xian
Bryol. Eur. 6: 23. pl. 552. 1853. Brachythecium salebrosum var. glareosum (Spruce) Grout, Moss Fl. N. Amer. 3: 337. 1928. Hypnum glareosum Bruch ex Spruce, Musci Pyren. 29. 1847. Type: Europe.
Plants medium-sized, pale green, glossy. Stems prostrate, pinnately or subpinnately branched, branches julaceous, attenuate or blunt at tips. Stem leaves appressed when dry, spreading when moist, broadly ovate, 2.1–2.5 mm × 1.0–1.1 mm, concave, deeply plicate, abruptly narrowed to a piliferous apex; margins entire; costae slender, ending above mid-leaf; median leaf cells linear, 65–95 µm × 7–10 µm, with angled ends, thin-walled; apical cells as long as the median cells or longer; basal cells lax; alar cells differentiated, quadrate or shortly rectangular; branch leaves ovate-lanceolate, 1.2–1.7 mm × 0.4–0.7 mm, slenderly acuminate, deeply plicate; margins usually serrulate above. Autoicous. Setae ca. 20–25 mm long, pale reddish, smooth. Spores not seen.