4. Ulota macrocarpa Broth. 大蒴卷叶藓 da shuo juan ye xian
Symb. Sin. 4: 70. 1929. Type: China. Hunan, Wukang, Yün-schan, Handel-Mazzetti 11191 (lectotype H).
Plants rather robust, green above, black below, in dense tufts. Stems erect or ascending, ca. 2 cm long, densely foliate, dichotomously branched, with broom-like branches. Leaves crisped when dry, spreading when moist, linear-lanceolate above, ovate at the base, ca. 4 mm long, acute; margins plane, entire; costae subpercurrent; upper leaf cells rounded, 6.5–7.8 µm wide, strongly thick-walled; basal cells narrowly rectangular, 26–32 µm × 4.0–6.5 µm, not particularly thick-walled, hyaline. Dioicous. Perichaetial leaves lanceolate, broader below, distinctly narrower above, ca. 2.4 mm × 0.14–0.30 mm. Setae ca. 3 mm long; capsules oblong-ovoid, ca. 2.5 mm long, not constricted below the mouth when dry, not furrowed, without longitudinal bands; exostome teeth 16, united in pairs, finely papillose; endostome segments 8, smooth. Calyptrae sparsely hairy. Spores 20–50 µm in diameter, papillose.