Selaginella eurynota A.Braun

  • Authority

    Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.

  • Family

    Selaginellaceae

  • Scientific Name

    Selaginella eurynota A.Braun

  • Description

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    Species Description - Stems suberect, rooting in lower ¼ of the plant, ca. 1 mm diam., articulate, not flagelliform, not stoloniferous; rhizophores stout, straight; aniso-phyllous throughout; lateral leaves obliquely oblong, slightly to highly crisped, near stem tips 4-4.5 mm long, near base of plant 1-1.5 mm long, tapering to acute apex, base truncate to subcordate, with central attachment, at right angles to stem or reflexed, margin short-ciliate at base, denticulate; median leaves obliquely ovate-lanceolate, long-acuminate, base with single peltate auricle, margin ciliate; axillary leaves linear-oblong, auriculate with divergent auricles, ciliate in lower half, denticulate above; sporophylls monomorphic, green, ascending, with denticulate margin; megasporangia single at base of strobilus; megaspores gray, 450-510 µm diam., white muri forming a reticulum; microspores beige.

  • Discussion

    Type. Costa Rica. Aguacate, Hoffmann 907 (B?; isotype K). Selaginella eurynota is part of a complex, along with S. schizobasis and S. sertata, which is in need of detailed work. Selaginella eurynota, found on the Pacific slope of Mexico, has leaves very similar to those of the other two species. It differs from S. schizobasis, found on the Atlantic slope of Mexico from Veracruz to Tabasco, in having large lateral leaves near the step tips and smaller leaves near the base of the stem and is suberect in habit. Selaginella schizobasis roots along most of its length. Selaginella sertata, which also occurs on the Pacific slope, has flagelliform stems.

  • Distribution

    Terrestrial on shaded roadsides and streambanks in wet tropical forests on the Pacific slope; Juchitán, Pochutla; 50-900 m. Mexico (Nay, Jal, Col, Gro, Oax, Chis); Guat to Pan.

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