Fissidens bryoides 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

    Fissidentaceae

  • Scientific Name

    Fissidens bryoides Hedw.

  • Description

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    Species Description - Plants erect to prostrate, considerably variable in size, 3-9 mm long, with branches from older ones; stems dark red at base. Leaves little changed on drying, 0.7-2 mm long, the perichaetial leaves slightly longer, mostly lanceolate and acute; margins ± entire, often bordered on all the laminae, the border 11-23 µm wide and 1-3 cells thick, ending well below the leaf apex and well above the base of dorsal laminae (often lacking on dorsal and ventral laminae); costa prominent, ending 2-6(-9) cells below the leaf apex; dorsal lamina narrowing but usually reaching the leaf insertion, not decurrent; vaginant laminae ± 1/2 the leaf length, ± unequal, the smaller of each pair of the perichaetial leaves often ending on the costa; cells irregularly quadrate to irregularly hexagonal, (8—)9—10(—13) µm long, ± isodiametric, smooth, only slightly bulging. Rhizautoicous. Perichaetia and perigonia terminal, the perigonial stems shorter. Setae 2-4.5 mm long; capsules 0.4-0.7 mm long, erect and symmetric; opercula conic-rostrate; peristome teeth divided ± 1/2 their length, finely papillose below, spirally thickened above. Spores (18-)22-25(-31) µm . Calyptrae cucullate, smooth.

  • Discussion

    Fig. 38

    F. bryoides Hedw., Sp. Muse. 153. 1801.

    F. pusillus (Wils.) Milde, Bryol. Siles. 82. 1869.

    F. viridulus (Sw.) Wahlenb. var. pusillus Wils., Bryol. Brit. 303.1855.

    This report is based, in part, on t wo specimens (Hermann & Crum 20895 & 20896, PAC). This expression of F. bryoides can be distinguished from other limbate species in the Mexican flora by a variable border that ends far short of the leaf apex and is sometimes absent from dorsal and ventral laminae of some leaves and by more or less smooth leaf cells that are nearly isodiametric in cross-section.

  • Distribution

    On granite boulder in stream, both exposed and submerged, at moderately high elevations (ca. 3000 m); Mexico and Veracruz.—Mexico; Norm America; Europe.

    Mexico North America| Europe| North America|