Heterophyllium affine (Hook.) M.Fleisch.

  • 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

    Sematophyllaceae

  • Scientific Name

    Heterophyllium affine (Hook.) M.Fleisch.

  • Description

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    Species Description - Plants in soft, yellow-green or yellow-brown mats. Branches loosely spreading, tapered, straight or curved, indistinctly flattened. Stem leaves larger (1.8-2 mm long) and more slenderly acuminate than the branch leaves. Branch leaves loosely erect, very slightly flattened, and ± secund when dry, erect-spreading when moist, about 1.3 mm long, oblong-ovate or oblong-lanceolate, long-acuminate; margins very narrowly reflexed at least when dry, coarsely serrate in the upper half, especially on the acumen; cells linear-flexuose above, shorter, broader, thick-walled, porose, and yellowish at the insertion; alar cells well-marked, hyaline, yellowish, or orange-red. Autoicous. Setae 24-45 mm long, red-brown to red, slender and flexuose; capsules suberect or inclined, curved-cylindric, 1.8-3 mm long; operculum apiculate; exostome teeth brownish; ciha of endostome long and well-developed, usually in 2s and 3s, occasionally single. Spores 15-16 µm, nearly smooth.

  • Discussion

    Fig. 732

    H. affine (Hook, ex Kunth) Fleisch., Musci Fl. Buitenz. 4: 1177. 1923.

    Hypnum affine Hook, ex Kunth, Syn. Pl. 1: 63. 1822, non H. adfine Hoffm., 1802.

    H. nemorosumBrid., Bryol. Univ. 2: 422. 1827.

    H. mohrianumC. Müll., Linnaea 38: 656. 1874.

    Heterophyllium nemorosum (Brid.) Kindb., Canad. Rcc. Sci 6 72. 1894.

    H. mohrianum (C. Müll.) Fleisch., Musci Fl. Buitenz. 4: 1177. 1923.

    The stem leaves are somewhat larger than branch leaves; both are coarsely serrate in the upper half. The alar cells are well marked in concave groups of subquadrate, thick-walled, often yellowish cells.

    Heterophyllium hastifolium (Card.) Fleisch., listed in Die naturlichen Pflanzenfamilien, is a meaningless combination based on a confusion of specimens of H. affine and Brachythecium hastifolium Card. (Theriot, 1931).

  • Distribution

    In moist, shady places, on rotten wood or bark (at the base of trees), at medium to moderately high altitudes (2000-3000 m); Chiapas, Hidalgo, Oaxaca, Tamaulipas, Veracruz.—Mexico; Guatemala; Colombia; Jamaica and Haiti; mountains of the southeastern United States; Siberia (Lake Baikal); reported from the Caucasus and the eastern Himalayas.

    Mexico North America| Guatemala Central America| Colombia South America| Jamaica South America| Haiti South America| United States of America North America| Russia Asia| China Asia| India Asia| Bhutan Asia| Armenia Europe| Azerbaijan Asia| Georgia Asia| Iran Asia| Russia Asia| Turkey Asia|