2. Lescuraea mutabilis(Brid.) Lindb. ex Hag. 多毛藓 duo-mao xian
Kongel. Norske Vidensk. Selsk. Skr. (Trondheim) 1908 (9): 53. 1909. Hypnum mutabile Brid., Muscol. Recent. 2 (2): 170. 1801. Type. Switzerland: Alps, without specific locality.
Plants small, soft, green, slightly shiny, in dense tufts. Stems creeping, slender, irregularly branched; branches short, simple; paraphyllia few, small, linear to lanceolate. Stem leaves lanceolate, acuminate, 1.8 mm × 0.45 mm, deeply plicate; margins recurved, dentate at apex; costa thick, strong, percurrent, smooth; median leaf cells sublinear, projecting at upper ends, 40–45 µm × 4–5 µm, thin-walled; alar cells distinctly differentiated, mostly quadrate to flatly quadrate, thin-walled, 8–12 µm wide; branch leaves similar to stem leaves, but rather smaller, upper costa dentate on dorsal side. Inner perichaetial leaves lanceolate, up to 1.3 mm long, from oblong-ovate base narrowed to a lanceolate apex; costa ending at middle; margins dentate above. Setae slender, 1.8 mm long, dark brown; capsules erect, oblong-ellipsoidal to cylindrical, 1.6–2.0 mm long, 0.55–0.60 mm thick; peristome double; exostome teeth lanceolate, 0.25 mm long, yellow or dark brown, transversely plicate below, hyaline, smooth above, lamellae low; endostome segments fragile, linear, ca. 1/2 the length of teeth; cilia absent or rudimentary; opercula with long rostrum, 0.5 mm long. Spores spherical, 16–22 µm in diameter.