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.

1. Peristome absent......................................................................................................................... 2. U. gymnostoma

1. Peristome present.................................................................................................................................................... 2

2. Endostome segments 16; calyptrae cucullate.................................................................... 5. U. morrisonensis

2. Endostome segments 8, rarely rudimentary; calyptrae mitrate........................................................................ 3

3. Endostome segments rudimentary or not clear; setae ca. 6 mm long............................................. 8. U. robusta

3. Endostome segments well developed; setae often less than 4 mm long............................................................. 4

4. Capsule urns ovoid; setae 0.8–1.1 mm long......................................................................... 6. U. perbreviseta

4. Capsules urns elongate-ovoid to cylindrical; setae 1.5–4.0 mm long............................................................. 5

5. Plants usually ca. 2 cm tall or taller; capsules indistinctly furrowed when dry, without forming longitudinal bands......................................................................................................................................... 4. U. macrocarpa

5. Plants usually ca. 1 cm or less than 2 cm tall; capsules distinctly furrowed when dry, often forming longitudinal bands..................................................................................................................................................... 6

6. Leaves ovate-lanceolate, scarcely rounded at the base............................................................... 3. U. japonica

6. Leaves linear-lanceolate, often rounded at the base.......................................................................................... 7

7. Stems erect, usually simple, or sparsely branched; endostome segments in 2 rows of cells......... 1. U. crispa

7. Stems prostrate, often branched; endostome segments in a single row of cells............................ 7. U. reptans