1. Jaffueliobryum wrightii (Sull.) Thér. 缨齿藓 ying-chi xian
Rev. Bryol., n.s. 1: 193. 1928. Grimmia wrightii (Sull.) Aust., Bull. Torrey Bot. Club 6: 46. 1875. Coscinodon wrightii Sull. in Sull. & Lesq., Musci Hep. U.S. (repr.) 132 [Schedae 30]. 1856. Type. U.S.A.: Texas, San Marcos, Wright s.n.
Jaffueliobryum latifolium Thér., Rev. Bryol., n.s. 1: 193. 1928. Coscinodon latifolius Lindb. & Arnell, Kongl. Svenska Vetenskapsakad. Handl. 23(10): 99. 1890, hom. illeg., non (Schwaegr.) De Not., 1836.
Jaffueliobryum marginatum Thér., Rev. Bryol., n.s. 1: 194. 1928.
Plants small to usually medium-sized, 0.5–2.0 cm high, yellowish green above, brownish below, in dense cushions. Stems erect, moderately branched, subjulaceous, with a well developed central strand in cross section. Leaves thin, somewhat hyaline, particularly at margins, densely imbricate when dry, erect-spreading when moist, broadly ovate to obovate, somewhat concave, 0.5–0.9 mm × 0.4–0.6 mm, abruptly narrowed from an ovate base to rounded-obtuse apex, often ending with hair-points shorter than lamina length; margins plane throughout; costa single, strong, excurrent in a long awn; upper leaf cells irregularly quadrate to rounded-hexagonal, 8–12 µm × 6–8 µm, chlrophyllose, thick-walled, 3–4 rows of cells near margins irregularly rectangular, hyaline, 15–18 µm × 6–8 µm, thin-walled; basal cells short-rectangular to rectangular, 15–28 µm × 11–16 µm, somewhat hyaline, thin-walled. Autoicous. Perichaetial leaves much larger than upper stem leaves. Setae straight, ca. 0.3 mm long, shorter than the capsule urn; capsules erect, immersed, brownish, ovoid, wide-mouthed, ca. 0.8 mm long; annuli differentiated, consisting of thick-walled cells; opercula conic, with short, obtuse beaks; peristome teeth lanceolate, irregularly divided above, perforate below, densely papillose throughout. Calyptrae large, campanulate, covering most of the capsule, longitudinally plicate, deeply lobed at base. Spores spherical, 7–9 µm in diameter, finely granulose.