Psilotum complanatum Sw.

  • Authority

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

  • Family

    Psilotaceae

  • Scientific Name

    Psilotum complanatum Sw.

  • Description

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    Species Description - Plants erect or arching, 10-50 cm long; main stems flattened, ca. 2 mm broad, terete or angled at very base, 2-7 times dichotomously branched; ultimate branches ca. 1 mm diam.; enations 12 mm long.

  • Discussion

    Type. Jamaica. Swartz s.n. (S; isotype B-Willd. 19437!). A. R. Smith (1971) treats this as a flattened form of P. nudum, believing typical P. complanatum may be confined to the Pacific basin, but Oaxacan material does not appear different from P. complanatum of Hawaii or Jamaica. It is best to keep it separate, distinguished by flattened aerial stems, until more detailed work is done on the genus.

  • Distribution

    Epiphytic in wet montane forest on tree fern trunks, or terrestrial among rocks; Ixtlán; 1200-1600 m. Mexico (Chih, Nay, Jal, Mor, Ver, Pue, Oax, Chis); Guat, Salv, Hond; Cuba, Jam, Hisp; Col, Ven, Peru; Pacific tropics. Oaxaca collection: 5624.

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