Thelypteris toganetra A.R.Sm.

  • Authority

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

  • Family

    Thelypteridaceae

  • Scientific Name

    Thelypteris toganetra A.R.Sm.

  • Description

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    Species Description - Rhizome long-creeping to suberect; fronds to 70 cm long, 30 cm wide, with a conform terminal segment; stipe and rachis on both sides glabrous, or above in the sulcus with a few stellate hairs less than 0.1 mm long; pinnae 10-16 pairs, incised 0.5-0.7 of their width, sessile, lowermost ones narrowed but still lobed at the base; segments subfalcate, acutish at apex; veins 7-15 pairs, 1-2 lowermost pairs connivent at or just below sinus, not truly united; costae on both sides glabrous or above with a few simple hairs ca. 0.2 mm long; costules, veins, and leaf tissue on both sides glabrous, but sometimes with scattered sessile reddish glands along costules and veins below; sori medial, exindusiate; sporangia glabrous; n = 36.

  • Discussion

    Type. Mexico. Veracruz: Atoyac River, Copeland Herb. 34 (UC!; isotypes GH!, MICH!, US!). Thelypteris toganetra is most similar and closely related to T. tetragona and T. imbricata, differing from the former in the veins connivent at the sinus or uniting at an acute angle just below the sinus and in the glabrous sporangia. From both species it differs in the glabrous lamina, with hairs lacking on all parts of the blade below.

  • Distribution

    Shaded wet banks along streams; Juchitán, Tuxtepec; ca. 60-300 m. Mexico (SLP, Ver, Oax, Chis); Guat, Bel.

    Mexico North America|