Hymenophyllum fendlerianum J.W.Sturm

  • Authority

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

  • Family

    Hymenophyllaceae

  • Scientific Name

    Hymenophyllum fendlerianum J.W.Sturm

  • Description

    Species Description - Rhizome creeping, 0.3 mm diam.; rhizome hairs centrally attached, sessile, reddish-brown, 0.8-1.0 mm (tip to tip); fronds 4-10 cm long, distant; stipe ca. ¼-1/3 the frond length, 0.1-0.2 mm diam., non-alate, a few hairs at base or gla-brescent; blade bipinnate to tripinnate, 1.2-2 cm wide, lower half of rachis mostly non-alate or essentially so; pinnae many, reduced, at blade base; segments 0.8-1 mm broad, entire, crisped, glabrous; sori terminal or lateral on pinnae, not immersed, 1.0 mm wide, 1.0 mm long, suborbicular, receptacles not exserted.

  • Discussion

    Mecodium fendlerianum (Sturm) Copeland, Philipp. J. Sci. 67: 26. 1938. Syntypes. Venezuela. Colonia Tovar, Fendler 35 (isosyntypes BM!, BR-photo BM!), Moritz 450 (isosyntype BM!). Hymenophyllum contortum van den Bosch, Ned. Kruidk. Arch. 5: 170. 1863. Mecodium contortum (van den Bosch) Copeland, Philipp. J. Sci. 67: 26. 1938. Type. Costa Rica. Aguacate, Hoffmann s.n. (B). A. R. Smith (1981) distinguished H. undulatum (Swartz) Swartz on the basis of the latter being less crisped and the pinnae not imbricate. Proctor (1985) suggested they may not be distinct. Hymenophyllum crispum is the only other species with undulate-crispate segments in Oaxaca, but the stipe in H. undulatum is not at all alate.

  • Distribution

    Epiphytic, less commonly terrestrial, in wet forests; Choapan, Ixtlán, Mixe, Villa Alta; 1150-1700 m. Mexico (Ver?, Oax, Chis); Guat, CR; Gr Antill; Col & Ven, to Bol & s Braz.

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