Hymenophyllum fendlerianum J.W.Sturm

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Hymenophyllaceae

  • Scientific Name

    Hymenophyllum fendlerianum J.W.Sturm

  • Description

    Species Description - Rhizomes creeping, 0.3 mm diam.; rhizome hairs centrally attached, sessile, reddish brown, 0.8–1 mm; fronds 4–10 x 1.2–2 cm, distant; stipes ca. 1/4–1/3 the frond length, 0.1–0.2 mm diam., non-alate, a few hairs at bases or glabrescent; blades 2–3-pinnate, glabrous, proximal half of rachises mostly non-alate or essentially so; pinnae many, reduced at blade bases, proximal 2–4 pairs short-stalked; segments 0.8–1 mm wide, entire, crisped, glabrous; sori terminal or lateral on pinnae, not immersed, 1x 1 mm, suborbicular, receptacles not exserted.

  • Discussion

    Mecodium fendlerianum (J.W. Sturm) Copel., Philipp. J. Sci. 67: 26. 1938. Hymenophyllum undulatum (Sw.) Sw. var. fendlerianum (J. W. Sturm) Stolze, Fieldiana, Bot., n.s., 20: 64. 1989. Lectotype (chosen by Lellinger, Me´m. New York Bot. Gard. 38: 12. 1984). Venezuela. [Aragua:] Colonia Tovar, Fendler 35 (isolectotypes BM!, BR-photo BM!, US!), Moritz 450 (isosyntype BM!). Hymenophyllum contortum Bosch, Ned. Kruidk. Arch. 5: 170. 1863. Mecodium contortum (Bosch) Copel., Philipp. J. Sci. 67: 26. 1938. Type. Costa Rica. Aguacata, Hoffman s.n. (B).

    Hymenophyllum fendlerianum is distinguished from H. undulatum by being more crisped and having imbricate pinnae. Proctor (1985) suggested they may not be distinct.

  • Distribution

    Epiphytic, less commonly terrestrial, in wet forests; 1150–1700 m. Mexico; Guat, CR; Gr Ant; Col, Ven, Sur, Ec, Peru, s Braz, Bol.

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