Bryum roseum (Hedw.) Crome

  • 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

    Bryaceae

  • Scientific Name

    Bryum roseum (Hedw.) Crome

  • Description

    Species Description - Plants robust, gregarious to loosely tufted, usually connected by subterranean stolons. Leaves very small, scale-like, and appressed below, abruptly larger and crowded in a comal rosette, wrinkled-flexuose and mostly ± spreading when dry, wide-spreading and decurved w h e n moist, 5-12 mm long, obovate, not or slightly acuminate, obtuse, not distinctly bordered (1-2 rows of marginal cells gradually narrower and thicker-walled); margins revolute in the lower 2/3 or more, plane and serrate above; costa not strong, ending below the apex to shortly excurrent; cells oblong-hexagonal, ca. 70-100 x 25-35 µm, with relatively thick, pitted walls; basal cells rectangular. Dioicous. Setae often in clusters of 2-3, stout, usually 3-5 cm long; capsules usually nutant, ± curved, oblong-pyriform, with an indistinct, short neck; operculum large, short-conic, apiculate; endostome with a high basal membrane, widely perforate segments, and nodulose or appendiculate cilia. Spores 18-24 µm, roughened.

  • Discussion

    Fig. 368

    B. roseum (Hedw.) Gaertn., Meyer & Scherb., Okon. Techn. Fl. Wetterau 3(2): 104.1802.

    Mnium roseum Hedw., Sp. Muse. 194. 1801.

    Bryum ontariense Kindb., Bull. Torrey Bot. Club 16: 96. 1889.

    Rhodobryum roseum (Hedw.) Limpr., Laubm. Deutschl. 3:444.1892.

    R. ontariense (Kindb.) Par. ex Kindb., Sp. Eur. N. Amer. Bryin. 2:346. 1897.

    Although some sentiment exists for separating Bryum ontariense from B. roseum, I prefer to view the species in a broad sense, at least tentatively. Bryum roseum has leaves crowded in rosulate tufts. The margins are revolute in the lower two-thirds or more and serrate above, with the border narrow and often rather indistinct.

  • Distribution

    On moist soil ± rich in humus, at altitudes of 2000-3000 m or more; Chiapas, Hidalgo, Mexico, Oaxaca, Puebla, Tamaulipas.—Mexico; Guatemala; North America; Europe; Africa; Himalayas and Siberia; Japan

    North America| Guatemala Central America| Europe| Africa| China Asia| Bhutan Asia| India Asia| Pakistan Asia| Nepal Asia| Russia Asia| Japan Asia|