8. Ulota D. Mohr 卷叶藓属 juan ye xian shu
Ann. Bot. (König & Sims) 2: 540. 1806. Orthotrichum subgen. Ulota (D. Mohr) Boulay, Musc. France, Mousses 342. 1884. Orthotrichum sect. Ulota (D. Mohr) Müll. Hal., Syn. Musc. Frond. 1: 711. 1849.
Plants small to medium-sized or rather large, dark green, yellowish green to brown or black, in loose tufts or dense mats. Stems elongate, prostrate or erect-ascending, with erect reproductive branches, simple or forked; rhizoids dense, brown. Leaves crisped or twisted when dry, erect-spreading or squarrose when moist, narrowly lanceolate with ovate base or linear-lanceolate; margins entire, often inflexed; costae single, strong, mostly subpercurrent; upper leaf cells hexagonal; lower cells narrowly elongate, yellow; basal marginal cells often differentiated into several rows of quadrate, thin-walled, hyaline cells. Gemmae usually present on leaves. Autoicous, rarely dioicous. Perichaetial leaves not or only slightly differentiated. Setae very short to elongate; capsules erect, ovoid, oblong-ovoid or cylindrical, symmetric, with 8 furrows, often forming ridges when dry; opercula convex or flat conic, with long, straight rostrate apices; annuli often persistent; stomata present in lower part of capsules; peristome usually double, rarely absent; exostome teeth 16, lanceolate, often united in pairs; endostome segments usually 8, rarely 16 or rudimentary. Calyptrae mitrate or rarely cucullate, lobed at the base, with golden hairs, rarely naked. Spores spherical, finely papillose to papillose.