8. Rhynchostegium serpenticaule (Müll. Hal.) Broth. in Levier 匐枝长喙藓 fu zhi chang hui xian
Nuovo Giorn. Bot. Ital., n.s., 13: 275. 1906. Eurhynchium serpenticaule Müll. Hal., Nuovo Giorn. Bot. Ital., n.s., 4: 271. 1897. Type: China. Shaanxi, Giraldi s.n.
Plants rather large, elongate, green or yellowish green, in loose mats. Stems prostrate, to 4–8 cm long, irregularly pinnately branched, with branches ca. 1.0–1.5 cm long. Stem and branch leaves similar, shortly ovate-lanceolate, 1.4–1.8 mm × 0.63–0.86 mm, plane or slightly irregularly undulate, shortly acuminate, often twisted at apex; margins serrulate above; costae slender, reaching ca. 3/4 the leaf length; median leaf cells linear-rhomboidal, 70–95 µm × 4.0–5.5 µm; basal cells differentiated in 2–3 rows across leaf base; alar cells few, shortly oblong or rounded-rhombic. Setae ca. 16 mm long, twisted, smooth; capsules elongate-ovoid, inclined; exostome teeth cross-striolate below, vertically striolate above; endostome segments perforate; basal membrane high; cilia 3, nodulose. Spores not seen.