Pellaea andromedifolia (Kaulf.) Fée

  • Authority

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

  • Family

    Pteridaceae

  • Scientific Name

    Pellaea andromedifolia (Kaulf.) Fée

  • Description

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    Species Description - Rhizomes long-creeping, 2–4 mm diam.; rhizome scales linearlanceolate, bicolorous, black with brown margins, irregularly dentate; fronds 10–60 cm long, 0.5–1 cm distant; stipes ca. 1/2 the frond length, stramineous to gray, terete or flattened adaxially, dull, glabrous, hairy or scaly; blades elongate-deltate, 2–3- pinnate, to 20 cm wide; pinnae ascending or perpendicular to rachises, costae straight; ultimate segments elliptic to ovate, truncate to subcordate at bases, rounded apices, 3–15 mm, herbaceous, veins visible, margins recurved on fertile segments; surfaces glabrous to sparsely pubescent; sporangia 64- or 32-spored; 2n =58 (USA).

  • Discussion

    Pteris andromedifolia Kaulf., Enum. Filic. 188. 1824. Type. U.S.A. California: Chamisso s.n. (P, photo GH, US). Pellaea andromedifolia (Kaulf.) Fe´e var. pubescens D. C. Eaton, Ferns N. Amer. 1: 205. 1878. Type. Mexico. [Nuevo Leo´n:] Monterrey, Nuttall s.n. (K).

    According to Windham (in FNA Ed. Comm., 1993), Pellaea andromedifolia comprises three cytotypes: a sexually reproducing diploid, an apogamous triploid, and an apogamous tetraploid. The apogamous tetraploid apparently resulted from hybridization between diploid and triploid individuals (Gastony & Gottlieb, 1985).

  • Distribution

    Rocky slopes and ledges, usually on igneous substrates; 0–500(–1100) m. USA (Calif, Ore); Mexico.

    Mexico North America| California United States of America North America| Oregon United States of America North America|