Barbula convoluta Hedw.

  • Authority

    Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part One: Sphagnales to Bryales. Mem. New York Bot. Gard. 69 (1): 1-452.

  • Family

    Pottiaceae

  • Scientific Name

    Barbula convoluta Hedw.

  • Description

    Species Description - Plants light- to dark-green above, light-brown below. Stems often branched, with red rhizoids or tomentum, about 10-12 mm high. Propagula on rhizoids, multicellular, up to 1150 µm long (with cells 25-50 µm), deep red-brown, globose to elongate-ellipsoidal. Leaves crowded, when dry erectincurved and contorted, when moist somewhat to widely spreading, 1-1.7 mm long, ligulate to ovate from an ovate base, grooved along the costa, rounded at the apex to broadly acute (or occasionally sharply acute), sometimes apiculate because of a smooth conic cell; margins weakly recurved in the lower third, papillose-crenulate; costa ending (4-)6-8 cells below the apex, weak, not bulging at back, covered ventrally by elongate cells and dorsally by cells with oval to rounded lumina (as viewed in section), the ventral stereids none or poorly represented and hydroids none; upper cells subquadrate, 8-10 µm wide, with massive compound papillae with 4—6 salients covering each lumen; basal cells rectangular, 9—12(—18) µm wide and 3-5:1 extending upward along the costa. Dioicous (or possibly rhizautoicous). Perigonia in terminal clusters on very small plants at base of female plants. Perichaetial leaves ovate to ovate-acute, convolute-sheathing, with cells entirely prosenchymatous. Setae 10-18 mm long, yellow to yellow-brown; capsules 0.8-1.3 mm long, red-brown, long-ellipsoidal, occasionally curved; annulus revoluble; operculum long-conic, 0.8-1.2 mm long; peristome teeth 700-1300 µm long, red, with many articulations, spiculose, twisted clockwise 1.5-2 times. Spores 10-12 µm, essentially smooth.

  • Discussion

    Fig. 216

    B. convoluta Hedw., Sp. Muse. 120. 1801.

    Tortula convoluta (Hedw.) Gaertn., Meyer & Scherb., Okon. Techn. Fl. Wetterau 3(2): 92. 1802.

    Streblotrichum convolutum (Hedw.) P.-Beauv., Prodr. Aetheog. 89. 1805.

  • Distribution

    Baja California, Baja California Sur, Chiapas, Chihuahua, Distrito Federal, Veracruz).—Mexico; widely distributed in the North Temperate Zone; New Zealand.

    Mexico North America| New Zealand