Bryum procerum Schimp. ex Besch.

  • 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 procerum Schimp. ex Besch.

  • Description

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    Species Description - Plants robust (3-6 cm high), scarcely lustrous, usually densely tufted. Stems simple or branched by stout, subfloral innovations. Leaves usually ± distantly and equally spaced except for a comal aggregation, variously wrinkled and erect to erect-spreading when dry, more spreading and often decurved when moist, up to 12 mm long, ± obovate, acuminate, abruptly narrowed and decurrent at base, distinctly bordered by 3-4 rows of hyaline, narrowly rhomboidal to sublinear, thicker-walled cells with pitted walls; margins serrulate to serrate in the upper half or more with teeth often paired; costa nearly percurrent; upper cells rhomboid-hexagonal, up to 90-120 x 35-40 µm, with relatively thick, pitted walls. Dioicous. Perigonium well-differentiated. Sporophytes 1-2 from a single perichaetium; setae usually 2-3 c -m long, ± flexuose-curved; capsules nutant to subpendulous, up to 6 x 12 mm, ± arched, subclavate, with a relatively long, slender neck; operculum large, low-conic, scarcely apiculate; endostome with a high basal membrane, broad, rather narrowly perforate segments, and nodulose cilia that are irregular in length. Spores 15-19 µm, nearly smooth.

  • Discussion

    Fig. 370a-c

    B. procerum Schimp. ex Besch., Mem. Soc. Sci. Nat. Cherbourg 16: 199. 1872.

    fl. caulifolium C. Müll., Nuovo Giorn. Bot. Ital. II, 4: 20. 1897.

    B. manginii Card., Rev. Bryol. 36: 115. 1909.

    B. geminidens Bartr., Bryologist 49:115. 1946.

    Distinctive characters are provided by long, equally spaced leaves with a decurrent base, double marginal teeth, and border consisting of narrowly rhomboidal or sublinear cells with pitted walls.

  • Distribution

    Usually on moist soil ± rich in humus, rarely on boulders or decayed wood; Distrito Federal, Durango, Mexico, Michoacan, Morelos, Oaxaca, Puebla, Yucatan.—Mexico; Guatemala and Costa Rica; Venezuela, Ecuador, and Bolivia.

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