4. Schwetschkea laxa (Wils.) Jaeg. 东亚附干藓 dong-ya fu-gan xian
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876–77: 222. 1878. Neckera laxa (Wils.) C. Müll., Syn. Musc. Frond. 2: 83. 1850. Pterogonium laxum Wils., London Bot. 7: 276. Pl. 10 E. 1848. Type. China: Guangdong, Chuanshan Qundao (Chusan), Islands, T. Anderson s.n.
Schwetschkea matsumurae Besch., J. Bot. (Morot) 13: 40. 1899. Type. Japan: Tokyo, Middle Honshu.
Schwetschkea sublaxa Broth. & Par., Rev. Bryol. 35: 41. 1908, syn. nov. Type. China: Shanghai, Zô cè, P. Henry s.n.
Plants slender, yellowish green or brownish green, not glossy to weakly glossy. Stems prostrate, irregularly branched, ascending; branches 3–5 mm long, julaceous. Stem leaves and branch leaves similar, not appressed when dry, not transparent, ovate-lanceolate, 1.0–1.2 mm × 0.3–0.5 mm, narrowed at base, tapering to a shortly acute apex; leaf margins straight, nearly entire; costa thick, vanishing in the middle of leaf; upper and median leaf cells rhomboidal to elliptic, 40–65 µm × 8–13 µm, thin-walled; apical leaf cells shorter; alar cells clearly differentiated, flatly quadrate, in several rows, thin-walled. Autoicous. Setae short, 2–3 mm long, smooth, yellowish brown; capsules ovoid, erect or slightly inclined; opercula conic-rostrate; peristome double; exostome teeth lanceolate, finely papillose; endostome segments nearly as long as the teeth, narrowly lanceolate, keeled. Spores 18–30 µm in diameter.