Polypodium dissimile L.

  • Authority

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

  • Family

    Polypodiaceae

  • Scientific Name

    Polypodium dissimile L.

  • Description

    Species Description - Rhizome creeping, 6-14 mm diam.; rhizome scales clathrate, long-attenuate, 7-12 mm long; fronds 20-100 cm long, distant; stipe ca. ¼ the frond length, stramineous, grooved, with abundant short white hairs (0.3-0.5 mm long); blade once-pinnate, narrowly oblong, 6.5-22 cm wide, apex pinnatifid; pinnae (12-)30-36 pairs, linear-deltate, falcate, acuminate, broadly adnate, generally not decurrent nor surcurrent, lower pinnae constricted basiscopically; lamina on both sides evenly pubescent with short white hairs (0.5-0.8 mm long), midvein and rachis with longer hairs (1.0 mm), margin slightly undulate; veins netted in 3-4 rows of areoles; sori round, in (2-)3(-4) rows; sporangia glabrous.

  • Discussion

    Type. Jamaica. Browne (LINN 1251.24). Lellinger (Amer. Fern J. 67: 100. 1977, op. cit. 70: 30. 1980) recently discussed the misapplication of this name. Polypodium chnoodes Sprengel, Neue Entd. 3: 6. 1822. Goniophlebium chnoodes (Sprengel) Fée, Mém. foug. 5: 255. 1852. Type. Martinique. Kohaut (Sieber exsicc.). Polypodium dissimile is distinguished by its densely hairy blade and broadly adnate pinnae.

  • Distribution

    Epiphytic in wet montane forests; Choapan, Ixtlán; 400-850 m. Mexico (Oax, Chis); Guat to Pan; WI, Trin; Col & Ven.

    Mexico North America|