6. Anomodon rugelii (Müll. Hal.) Keissl. 皱叶牛舌藓 zhou-ye niu-she xian
Ann. Naturhist. Hofmns. 15: 214. 1900. Hypnum rugelii C. Müll., Syn. Musci. Frond. 2: 473. 1851. Type. U.S.A.: Tennessee, Smoky Mountains, Rugel s.n.
Plants small to medium-sized, yellowish green or yellowish brown, in densely tufted cushions. Primary stems creeping; secondary stems ascending, up to 4 cm long, irregularly pinnately branched; central strand absent. Stem leaves ca. 1.0–2.5 mm long, ovate or oblong ovate at base, usually auriculate at both angles; leaf margins entire or finely serrate above; costa slender, up to leaf apex, smooth or papillose on back surfaces; median leaf cells rounded quadrate or hexagonal, ca. 5–15 µm wide, 5–10 papillae per cell, thick-walled; basal cells near costa mostly oblong, hyaline; branch leaves narrowly ovate-lanceolate. Dioicous. Perichaetial leaves ovate-lanceolate, 2 mm long. Setae yellowish brown to reddish brown, 7–15 mm long; capsules erect; exostome teeth yellowish brown, papillose above, hyaline; endostome often short or absent. Calyptrae ca. 4 mm long, smooth. Spores 10–25 µm in diameter, papillose.