Fissidens subbasilaris 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 subbasilaris Hedw.

  • Description

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    Species Description - Plants ascending to erect, branching from older prostrate parts often somewhat tufted or matted, up to 12 mm long. Leaves up to 2.3 mm long, mostly oblong, rounded and apiculate to acute at the apex; margins unbordered, evenly crenate-serrulate, becoming unevenly serrulate at the apex; costa usually ending several cells below the apex, covered and obscured above the vaginant laminae by green cells similar to laminal cells; dorsal lamina variable, ending at the leaf insertion or some distance above it; vaginant laminae ± equal, 1/2 - 2/3 the leaf length; cells irregularly rounded-hexagonal, 7.5-10 µm, irregularly bistratose, smooth but bulging. Cladautoicous. Perigonia lateral and terminal. Perichaetia lateral. [Setae 3-5 mm long; capsules oblong-cylindric, up to ca. 1 mm long, usually erect and symmetric; opercula longrostrate; peristome teeth divided ±1/2 their length, finely papillose below, articulated and ± smooth above. Spores 16-18 µm, finely papillose. Calyptrae cucullate.-Sporophytes, not seen in Mexican material, described from specimens in PAC]

  • Discussion

    Fig. 24f-h

    F. subbasilaris Hedw., Sp. Muse. 155. 1801.

    The only species with which F. subbasilaris can be confused is F. obscurocostatus. In both species the tip of the costa is obscured by small, green cells. T h e sporophytes of F. subbasilaris, are lateral, from near the base, and have more or less cylindric capsules; the perichaetial leaves are unbordered; and the cells are irregularly bistratose.

  • Distribution

    On bark of trees (but elsewhere also on decaying wood and limestone) at elevations of 1500 m; San Luis Potosi, Tamaulipas.-Mexico; eastern North America from Ontario to the Gulf States and west to Iowa, Kansas, Oklahoma, and Texas.

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