Adiantum tricholepis Fée

  • Authority

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

  • Family

    Pteridaceae

  • Scientific Name

    Adiantum tricholepis Fée

  • Description

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    Species Description - Rhizome short, stout, compact, erect or ascending; rhizome scales golden brown, becoming brown, 5-6 mm long, 0.8-1.5 mm wide, linear-lanceolate, apex with an ephemeral twisted hair, ciliate-denticulate, especially in distal half; fronds clumped, to 70 cm long; stipe ca. 1/3 the frond length, castaneous to atropurpureous, terete, glabrous; blade ovate, 3-4-times pinnate, 15-35 cm wide; pinnae 4-8 pairs, alternate; segments stalked (2-6 mm long), not articulate, stalk color passing into segment entire to crenate, 12-20 mm long, flabellate, pilose above and below with stiff whitish hairs (0.3 mm long); sori few to several (310) per segment, 1.5-7 mm long; indusium reniform, pubescent, with hairs 0.3 mm long; spores tan.

  • Discussion

    Type. Mexico. [Jalisco:] Rio Grande de Lerma nr. Guadalajara, Galeotti 6445 (BR!; isotype BR!). Adiantum chilense Kaulfuss var. pilosulum Liebmann, Mexic. bregn. 267 (seors. 115). 1849. Type. Mexico. Veracruz: Papantla, Liebmann [Pl. Mex. 2248, Fl. Mex. 440, 441] (C!; isotype US!). Adiantum tricholepis is readily identified by the presence of stiff, whitish hairs on the upper and lower blade surfaces.

  • Distribution

    Terrestrial, on dry cliffs near streams; Pochutla, Yautepec; 50-800 m. Mexico (Son, Chih, Coah, Sin, Dgo, Nay, Jal, Col, Gro, Mor, Mex, NL, SLP, Tam, Ver, Oax, Chis, Camp, Yuc); US (Tex); Guat, Bel.

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