4. Jaffueliobryum Thér. 缨齿藓属 ying-chi xian shu
Rev. Bryol., n.s. 1: 192. 1928.
Plants small to medium-sized, often glossy, grayish green to dark green, in dense cushions or tufts. Stems erect, remotely branched, more or less julaceous, with central strand in cross section. Leaves crowded, appressed, usually imbricate when dry, erect-spreading when moist, broadly ovate to obovate, abruptly narrowed to acute or rounded-obtuse at apex; margins plane or slightly incurved at leaf base, entire, often hyaline or sometimes appearing bordered; costa single, strong, excurrent, ending in a hyaline awn; upper median cells quadrate to irregularly hexagonal or rounded rhomboidal, mostly unistratose, rarely bistratose in places, smooth, thick-walled, sometimes a few rows of cells hyaline at margins; basal leaf cells subquadrate to short-rectangular, thin- to thick-walled. Autoicous. Perichaetial leaves larger than stem leaves. Setae erect, shorter or somewhat longer than capsule urn; capsules erect, immersed in perichaetial leaves, ovoid or broadly ellipsoidal; exothecial cells irregularly rectangular, thin- to thick-walled; stomata present at base of urn; annuli differentiated, consisting of 2–3 rows of thick-walled cells; opercula conic, short to somewhat long-rostrate; peristome teeth lanceolate, irregularly divided into 3–4 filaments in the upper part, sometimes highly perforate, densely papillose. Calyptrae large, campanulate, almost covering the entire capsule, deeply and longitudinally plicate, not hairy, lobed at base. Spores small, spherical, yellowish, nearly smooth or granulose.