Thelypteris blanda (Fée) C.F.Reed

  • 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 blanda (Fée) C.F.Reed

  • Description

    Species Description - Rhizome erect or suberect; stipe 10-20(-25) cm long, ca. 1 mm diam., stramineous or darkened, glabrous; rachis with a few stellate hairs ca. 0.1 mm long, glabrescent, without buds; lamina pinnate-pinnatifid, ovate-lanceolate, 12-25 cm long, 6-10(-15) cm wide, gradually reduced to a pinnatifid apex; pinnae 7-12 pairs, sessile, to 7.5 cm long, 1.5(-2.0) cm wide, the lowermost pair somewhat shortened and deflexed, incised to within 1 mm of costae; segments 7-15 pairs per pinna, oblique, obtuse or acutish at apex; veins 5-6 pairs per segment, reaching margin above sinus; costae on both sides sparsely pubescent with acicular hairs 0.2-0.4 mm long; leaf tissue herbaceous, thin, dark green, glabrous; sori inframedial to medial, exindusiate; sporangia glabrous; n = 36.

  • Discussion

    Phegopteris blanda Fée, Mém. foug. 8: 91. 1857. Dryopteris blanda (Fée) Christensen, Index filic. 254. 1905. Type. Mexico. Veracruz: Mirador, Schaffner 222 (not found at P; isotype K!). Phegopteris caespitosa Fournier, Mexic. pl. 1:89. 1872. Dryopteris caespitosa (Fournier) Chirstensen, Index filie. 256. 1905. Type. Mexico. Veracruz: Cordova, Bourgeau 2005 (P!; isotypes C, GH!, K!, MO!, NY!, P!, US!). From other Oaxacan Goniopteris, T. blanda differs in having small fronds with pinnae often shorter than 5 cm long, exindusiate sori, blades without a distinct terminal pinna, and the lamina glabrous below or with a few simple hairs on the costae. Stellate or furcate hairs are found scattered primarily along the rachis, especially in the adaxial groove.

  • Distribution

    Along stream banks and trails, limestone outcrops; Cuicatlán, Juchitán, Teoti-tlán, Tuxtepec; (120-)300-1500 m. Mexico (Hgo, Ver, Oax, Chis); Guat, Bel, Hond, CR.

    Mexico North America| Costa Rica South America| Honduras Central America| Belize Central America| Guatemala Central America|