14. Brachythecium glauculum Müll. Hal. 灰青藓 hui qing xian
Nuovo Giorn. Bot. Ital., n.s., 5: 199. 1897. Type: China. Shaanxi, Sept.-Nov. 1896, Giraldi s.n.
Plants slender, grayish green, glossy, in large mats. Stems prostrate, densely irregularly branched, julaceous, branches attenuate at tips, often with curved branchlets. Stem leaves imbricate when dry, spreading when moist, ovate, 1.20–1.48 mm × 0.39–0.52 mm, abruptly and shortly acuminate at apex; margins often reflexed, nearly entire or minutely serrulate near apex, decurrent at base; costae ending in leaf acumen; median leaf cells linear, 53–67 µm × 5–7 µm; alar cells hyaline, not extending close to costa at leaf base; branch leaves ovate-lanceolate, 0.95–1.22 mm × 0.21–0.54 mm, distinctly concave; costae shorter, well below leaf apex. Autoicous? Perichaetial leaves sheathing at base, reflexed, distinctly single costate. Setae ca. 17 mm long, twisted, papillose above, less papillose or nearly smooth below; capsules slightly inclined, shortly cylindrical; opercula shortly conic-rostrate; endostome segments as long as exostome teeth, papillose; cilia 2–3, nodulose. Spores not seen.