Sematophyllum marylandicum (Müll.Hal.) E.Britton

  • 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

    Sematophyllum marylandicum (Müll.Hal.) E.Britton

  • Description

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    Species Description - Plants relatively robust, in green, yellow, or golden-brown, shiny mats. Branches ± turgid and sometimes cuspidate- tipped, straight, ascending. Leaves erect or erect-spreading, not homomallous, 1.5-2 mm long, concave, oblong-ovate, acute or broadly short-acuminate; margins somewhat reflexed below, entire; upper median cells linear, 12:1 or more; alar cells abmptly inflated in 2 tiers, yellow. Autoicous. Perichaetial leaves entire. Setae 10-18 mm long; capsules strongly inclined, 1-1.2 mm long; annulus very narrow; cilia of endostome fused in pairs. Spores 13-20 µm, faintly roughened. (Sporophytes not seen in Mexican material.)

  • Discussion

    Fig. 746

    S. marylandicum (C. Müll.) Britt., Bryologist 5: 66. 1902.

    Hypnum marylandicum C. Müll., Syn. Muse Frond. 2: 328. 1851.

    The seepy habitat, robust stature, erect leaves, and alar cells conspicuously inflated in t wo rows give ample distinction to this species.

  • Distribution

    On wet, shaded rock slope, Oaxaca (Sierra de Juarez, Sharp & McFarland 582b, with Hygrohypnum micans, TENN).—Mexico; widespread on wet acidic rocks in eastern North America.

    Mexico North America|