Tropicos | Name - !Didymodon vinealis (Brid.) R.H. Zander

Cent. Amer. Moss > Pottiaceae > Didymodon > Didymodon vinealis

Choose Project down

English

!Didymodon vinealis (Brid.) R.H. Zander

Search in Muséum national d'Histoire naturelle

Search in Type Specimen Register of the U.S. National Herbarium

Search in African Plants Database at Geneva Botanical Garden

African Plants, Senckenberg Photo Gallery

Project Name Data (Last Modified On 2/15/2011)

Acceptance : Accepted

Project data (Last Modified On 2/15/2011)

Discussion:

Although D. vinealis is a common species in the southwestern United States, it is only known from a few places in Central America. The species has ovate-lanceolate leaves that are channeled on the ventral surface and keeled near the apex, firm-walled, pluripapillose upper leaf cells, and a percurrent costa with quadrate cells on the upper ventral surface, no ventral stereids, and guide cells in 1–2 layers near the base. Didymodon vinealis has been considered (Zander 1978b) closely related to Barbula due to its relatively long, twisted peristome, channeled leaves, and multiplex leaf cell papillae.

Didymodon acutus differs from this species in having plane to concave leaves, stoutly excurrent costae with guide cells in 1 row near the base, and smooth to unipapillose upper leaf cells.

Illustrations: Bruch and Schimper (1842a, Pl. 148); Grout (1938, Pl. 86); Bartram (1949, Fig. 57 E–H); Lawton (1971, Pl. 39 14–19); Smith (1978, Fig. 124 1–7); Zander (1981, Pl. 5); Nyholm (1989, Fig. 71 A); Sharp et al. (1994, Fig. 233); Ku_era (2000, Fig 21). Figure 28.

Habitat: On soil, moist trail side bank, base of Taxodium, and limestone boulders; 2000–3000 m.

Distribution in Central America: GUATEMALA. Huehuetenango: Steyermark 50456 (F, FH, MO, NY, US); Quezaltenango: Sharp 1933 (FH). HONDURAS Comayagua: Olson 84–28a (MO). NICARAGUA. Managua: Guzmán & Castro 1991 (MO); Matagalpa: Danin 4-E (MO, NIC). COSTA RICA. Alajuela: McQueen 5027 (MO); Cartago: Crosby 9785 (MO); San José: Crosby 2477 (MO).

World Range: Western Canada, Northwestern and Southwestern U.S.A.; Mexico; Central America; Western and Southern South America; Northern, Middle, East, Southwestern, and Southeastern Europe; Siberia, Russian Far East, Caucasus, Middle Asia, China, Eastern Asia, Western Asia, Arabian Peninsula; Northern Africa; Indo-China.

Export To PDF

Export To Word

Didymodon vinealis (Brid.) Zand., Phytologia 41: 25. 1978.

Barbula vinealis Brid., Bryol. Univ. 1: 830. 1827. Barbula fallax Hedw. var. vinealis (Brid.) Hüb., Muscol. Germ. 327. 1833. Tortula fallax var. vinealis (Brid.) DeNot., Mem. Reale Accad. Sci. Torino 40: 319. 1838. Tortula vinealis (Brid.) Spruce, London J. Bot. 4: 194. 1845. Protologue: Germany. In vinearum muris soloque calcareo circa Durlach densis caespitibus habitat. Clar. Braun detexit et communicata.

Plants small, dull, green to dark-green, at times red-brown above, brown below, in tufts to 15 mm high. Stems red, erect, sparsely and irregularly branched, sclerodermis and central strand present; rhizoids sparse, at base of stems or scattered throughout. Axillary hairs 3–5 cells long, basal cell brown. Leaves 1–2.5 mm long, long-triangular, ovate-lanceolate or lanceolate, spreading at base, erect-incurved and twisted to spreading-flexuose when dry, wide-spreading when wet, grooved with a narrow median channel along the costa on ventral surface, keeled above; apices acute to obtuse; margins entire, recurved below; costa percurrent, surface ventral cells quadrate, guide cells in 1–2 layers, ventral stereid band absent, dorsal stereid band present, ventral and dorsal surface cell layer enlarged; upper and basal cells weakly differentiated, upper cells in regular rows, quadrate or oblate, 7–9 μm wide, firm-walled, pluripapillose, basal cells quadrate to short-rectangular, firm-walled, smooth, 8–14 x 6–8 μm, alar cells not differentiated. Dioicous. Perichaetia and perigonia terminal. Setae smooth, 8–14 mm long, red. Capsules cylindric, erect, 1.5–2.0 mm long, smooth; exothecial cells short-rectangular, firm-walled; stomata in neck; opercula erect, long-conic, 1–1.5 mm long; annuli well-developed; peristome yellow to hyaline, basal membrane low, teeth spiculose, straight to weakly twisted. Spores 8–12 μm, smooth. Calyptrae cucullate, 2.5 mm long.