6. Brachythecium coreanum Cardot 尖叶青藓 jian ye qing xian
Bull. Soc. Bot. Genève, ser. 2, 3: 289. 1911. Type: Korea. Haoang-hai-to, Faurie 650.
Brachythecium piliferum Broth., Ann. Bryol. 1: 23. 1928, hom. illeg.
Plants large, glossy, in dense mats. Stems prostrate, pinnately branched, with curved branches, densely foliate. Stem and branch leaves similar, oblong-ovate-lanceolate, 2.16–2.61 mm × 0.68–0.81 mm, concave, irregularly and deeply plicate, gradually acuminate to a long, slender apex; margins entire below, serrulate above; costae slender, ending well above mid-leaf; median leaf cells linear, 90–103 µm × 7–8 µm, thin-walled; basal and alar cells shorter and broader, subquadrate. Dioicous. Perichaetial leaves lanceolate; costate weak. Setae 10–15 mm long, roughened throughout; capsules shortly cylindrical, with a distinct neck; peristome double; endostome segments as long as the exostome teeth, perforate; cilia as long as the segments. Spores not seen.