Dennstaedtia dissecta (Sw.) T.Moore

  • 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 dissecta (Sw.) T.Moore

  • Description

    Species Description - Rhizome short-creeping, 10 mm diam fronds 1.5-3.5 m long; stipe stramineous; blade tripinnate to quadripinnate, deltate; lower pinnae opposite, subsessile, buds frequently in axils of pinnae, lower pinnules reduced; apical segments separate to tip; lamina glabrous to pubescent beneath, especially on axes, hairs whitish, subap-pressed, ascending and more or less curled; sterile vein endings clavate; vertical wings lacking; indusium purse- to cup-shaped, much wider than deep (1-1.3 mm wide, 0.3 mm deep).

  • Discussion

    Polypodium dissectum Swartz, Prodr. veg. ind. occ. 134. 1788, nom. illeg., non Forster, 1786. Dicksonia dissecta Swartz, J. Bot. (Schrader) 1800(2): 91. 1801. Type. Jamaica. Swartz s.n. (S, photo & frag. US!). Dicksonia cornuta Kaulfuss, Enum. filie. 227. 1824. Dennstaedtia cornuta (Kaulfuss) Mettenius, Ann. Sci. Nat. Bot. V, 2: 260. 1864. Type. Brazil. “Ex Spreng.” [Sello s.n. (B) may be the collection described (R. Tryon, Contr. Gray Herb. 194: 24. 1964)]. Dicksonia obtusifolia Willdenow, Sp. pl. 5: 483. 1810. Dennstaedtia obtusifolia (Willdenow) Moore, Index fil. 306. 1861. Type. Venezuela. Caracas, Bredemeyers.n. (B-Willd. 20163!; frag. LE!). Dennstaedtia dissecta is distinguished by its clavate vein endings and broad indusia.

  • Distribution

    Wet montane forests; Ixtlán, Juquila, Pochutla, Putla, Tehuantepec; 900-2450 m. Mexico (Ver, Oax, Chis); Guat to Pan; Gr Antill, Trin; Col & Ven, to Bol & Braz.

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