1. Pottia intermedia (Turn.) Fuernr. 短齿丛藓 duan-chi cong xian
Flora 12, 2(Erg. 2): 13. 1829. Gymnostomum intermedium Turn., Muscol. Hibern. Spic. 7. pl. 1: f. a–c. 1804. Tortula modica Zand., Bull. Buffalo Soc. Nat. Sci. 32: 226. 1993. Type. Europe.
Plants very small, less than 5 mm high, in dense tufts. Stems very short, simple, rarely branched. Leaves imbricate when dry, spreading when moist, ovate to ovate-lanceolate, gradually acute at the apex, with a long awn; margins entire, slightly incurved; costa shortly excurrent, with low lamellae on the ventral surface; upper leaf cells quadrate to hexagonal, pluripapillose on both sides; basal cells rectangular, smooth. Dioicous. Setae elongate, ca. 5–7 mm long; capsules erect, obovoid; opercula short conic-rostrate; peristome teeth very short, irregular, densely papillose.