Selaginella convoluta (Arn.) Spring

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Selaginellaceae

  • Scientific Name

    Selaginella convoluta (Arn.) Spring

  • Description

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    Species Description - Stems fasciculate from a rhizomatous base, rosette-forming or occassionally erect, green or sometimes reddish, 4–15 cm long, 0.7–1.2 mm diam., not articulate, not flagelliform, not stoloniferous, 2–3 times branched; rhizophores restricted to bases of stems, filiform, 0.2–0.5 mm diam.; leaves of two kinds (anisophyllous) throughout stem length, coriaceous; lateral leaves ascending, imbricate, broadly ovate, 2.5–3 x 1.5–2 mm, bases peltate peltate, truncate, short-ciliate, margins hyaline to greenish, with a submarginal brown band, short-ciliate to denticulate, apices acute to acuminate; median leaves imbricate, ovate to ovateoblong, 2.2–3 x 0.8–1.5 mm, bases peltate, truncate, denticulate to short-ciliate, margins greenish to hyaline, short-ciliate, denticulate distally, apices acute to acuminate; axillary leaves similar to lateral leaves or more lanceolate; strobili quadrangular, 5–25 mm long; sporophylls monomorphic; megasporangia mostly basal in two ventral rows; microsporangia in two dorsal rows and distal in ventral rows; megaspores and microspores not seen.

    Distribution and Ecology - Terrestrial or epipetric in dry, exposed conditions on roadsides and slopes; 0–100 m. Mexico; Guat, Hond; Cuba, Hisp; Braz, Bol, Parag, Arg.

  • Discussion

    Lycopodium convolutum Arn., Mem. Wern. Nat. Hist. Soc. 5: 199. 1824, non P. Beauv.) Desv. ex Poir. (1814), nom. illeg., published only in synonymy. Type. Brazil. Rio de Janeiro: near Rio de Janeiro, Jameson s.n. (E). Selaginella longispicata Underw. ex Millsp., Publ. Field Columbian Mus. Bot. Ser. 1: 287. 1896. Type. Mexico. Yucata´n: Near Itzamal, Gaumer 825 (NY!; isotypes F!, NY).

    Unverified, Doubtful, or Mistaken Reports. Camp (Cebellos- Cambranis 136, UADY, cited by Palacios-Rios, 2002a, but not verified). Among the rosette-forming selaginellas of Mexico, S. convoluta is distinct by its peltate lateral leaf bases with a single auricle and its occurrence only on the Yucatan Peninsula.

  • Distribution

    Mexico North America|