Hylocomium brevirostre (Brid.) Schimp.

  • Authority

    Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)

  • Family

    Hylocomiaceae

  • Scientific Name

    Hylocomium brevirostre (Brid.) Schimp.

  • Description

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    Species Description - Rather coarse and moderately robust plants in loose, dull, green, yellow-green, or brownish mats. Stems reddish, arched and stoloniferous, irregularly forked and subpinnately branched above an inconspicuously stipitate base; paraphyllia abundant but small, pale, and inconspicuous. Leaves of the stipe and arched stolons sheathing at the base and squarrose-spreading at the tips; other stem leaves loosely erect or erect-spreading when dry, erect-spreading when moist, 2.2-3 mm long, broadly ovate, rounded to the insertion and somewhat sheathing at base, gradually long-acuminate, ± pinched and mgose at the base of the acumen, moderately plicate; margins plane, serrate in the upper half or more, sermlate nearly to the base; costa double, varying in length, 1 branch longer and extending 1/3 to 1/2 or more the leaf length; cells oblong-linear, smooth and rather thin-walled above, becoming somewhat thick-walled and moderately porose toward the base. Branch leaves smaller, 1.2-1.8 mm long, ovate-lanceolate, not clasping or notably rounded at the base. Setae 15-35 mm long, slender and flexuose, red; capsules 2-2.5 mm long, red-brown; operculum 1-1.4 mm long, stoutly rostrate. Spores 15-20 µm, finely papillose.

  • Discussion

    Fig. 789

    H. brevirostre (Brid.) B.S.G., Bryol. Eur. 5 (fasc. 48/51). 1852.

    Hypnum rutabulum Hedw. var. brevirostre Brid., Muscol. Recent. 2(2): 162.1801.

    Loeskeobryum brevirostre (Brid.) Fleisch. ex Broth, in E. & P., Nat. Pfl. ed. 2, 11:482. 1925.

    Pterobryopsis dentata Ther., Rev. Bryol. Lichenol. 14: 18. 1944.

    Arched above a short stipe, the plants have an abundance of paraphyllia, and the stipe leaves are squarrose or squarrose recurved at the tips. The other stem leaves are pinched and rugose at base of the acumen, strongly toothed in the upper half or more, and non-decurrent at basal angles. The Guatemalan Hylocomium giganteum Bartr., not yet known from Mexico, has a very long, trailing main axis which ends in a bluntly-foliate apex and appears to grow indefinitely. By contrast, H. brevirostre regularly innovates some distance behind a tapered stem tip that then ceases growth.

  • Distribution

    On soil, humus, rock, logs, and stumps at 2800-3500 m alt.; Guerrero (Puerto del Gallo) and Oaxaca (Sierra de Juarez).—Mexico, Guatemala; Haiti, Newfoundland to Ontario, south in the uplands to Tennessee and North Carolina; widespread in Europe; Japan; reported from North Africa and the Caucasus.

    Mexico North America| Guatemala Central America| Haiti South America| Canada North America| Europe| Japan Asia| Algeria Africa| Egypt Africa| Tunisia Africa| Libya Africa| Morocco Africa| Sudan Africa| Armenia Europe| Azerbaijan Asia| Georgia Asia| Iran Asia| Russia Asia| Turkey Asia|