Dennstaedtia bipinnata (Cav.) Maxon

  • Authority

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

  • Family

    Dennstaedtiaceae

  • Scientific Name

    Dennstaedtia bipinnata (Cav.) Maxon

  • Description

    Species Description - Rhizome long-creeping, 5-10 mm diam., hairy; fronds 2-3 m long, 1-1.5 m wide, clumped; stipe ½ the frond length; blade deltate; fronds 3-4-pinnate; texture coriaceous to firm-herbaceous; lower pinnules stalked, basal pinnules not especially reduced, basal segments of pinnules of central pinnae alternate, unequal in size, axes of penultimate segments with wing on upper surface; sterile vein tips slender; lamina glabrous above, hairs beneath scattered, mostly near axes, 1 mm long, clear brown, spreading and straight; indusium cylindrical to subcylindrical, 0.8 mm deep, 0.8-1.0 mm wide.

  • Discussion

    Dicksonia bipinnata Cavanilles, Descr. pl. 174. 1802. Type. Puerto Rico. Ventenat s.n. (MA; isotype B-Willd. 20165-1!, frag. US!). Dicksonia adiantoides Humboldt & Bonpland ex Willdenow, Sp. pl. 5:488. 1810. Dennstaedtia adiantoides (Humboldt & Bonpland ex Willdenow) Moore, Index fil. xcvii. 1857. Type. Venezuela. Caripe, Humboldt & Bonpland 466 (B-Willd. 20165-2!, photo GH, frag. US!; isotype P-Humb.!). The lustrous, coriaceous lamina and cylindrical indusium serve to identify this species.

  • Distribution

    Wet montane forests; Ixtlán; 450600 m. Mexico (Dgo, Hgo, Ver, Oax, Chis); US (Fla); Guat to Pan; Gr Antill, Trin; Col & Ven to Bol.

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