Bryum dichotomum 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

    Bryaceae

  • Scientific Name

    Bryum dichotomum Hedw.

  • Description

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    Species Description - Small, scarcely lustrous plants, usually in dense tufts. Stems slender, usually subflorally branched. Yellowish, bulbous, axillary gemmae often present. Leaves closely spaced nearly throughout, appressed when dry, erect-spreading when moist, ovate, short-acuminate, ± narrowed at base, not bordered; margins entire, narrowly reflexed below; costa strong, nearly percurrent to rather long-excurrent; cells oblong-rhomboidal above, short-rectangular below. Dioicous. Setae slender, 0.5 to more than 2 cm long; capsules nutant to pendulous, with a short neck isodiametric with the urn and scarcely wrinkled when dry; operculum relatively large, nearly hemispheric, apiculate; segments of the endostome narrowly perforate and cilia nodulose, occasionally varying in length. Spores ca. 10 µm, nearly smooth.

  • Discussion

    Fig. 345f-k

    B. dichotomum Hedw., Sp. Muse. 183. 1801.

    B. bicolorDicks., Pl. Crypt. Brit. 4: 16. 1801.

    The plants are small, with erect or appressed, unbordered leaves. The capsule has a short, thick neck scarcely wrinkled when dry. Axillary brood bodies are often present.

  • Distribution

    On moist soil of banks; Chiapas, and Tamaulipas.—Mexico; widespread in the Northern and Southern Hemispheres but commonly sterile and thus overlooked.

    Mexico North America|