Anemia karwinskyana (C.Presl) Prantl

  • Authority

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

  • Family

    Anemiaceae

  • Scientific Name

    Anemia karwinskyana (C.Presl) Prantl

  • Description

    Species Description - Rhizomes horizontal, compact, short-creeping, 6–9 mm diam.; rhizome hairs orange; fronds erect, (14–)20–60 cm long; stipes 1/2–3/4 the frond length, 1–1.5 mm diam., stramineous, hirsute; blades deltate to deltate-ovate or narrowly oblong, 2- pinnate, rarely bipinnate-pinnatifid, 6–15 cm wide, subcoriaceous, mostly catadromous; pinnae 8–12 pairs, subopposite to alternate, pinnules narrowly adnate, subcordate at base, segments ovate-obtuse, lobes rounded, hirsute; veins free; fertile pinnae remote from the sterile pinnae, shorter than or usually equal to the sterile blades in height; spores striate, ridges subverruculate.

  • Discussion

    Anemia villosa Humb. & Bonpl. ex Willd. ??[sic] karwinskyana C. Presl, Suppl. Tent. Pterid. 83. 1845. Type. Mexico. “Christo,” Karwinski “exs. n. 8” (B!, frag. NY!; isotype US!).

    Anemia rosei Maxon, N. Amer. Fl. 16: 46. 1909. Type. Mexico. Jalisco: Cerro de San Esteban, Pringle 11254 (US!; isotype NY!).

    Unverified, Doubtful, or Mistaken Reports. Hond (Meyer 9924, MO, cited by Moran & Mickel in Davidse et al., 1995, is A. guatemalensis Maxon).

    This species is recognized by its catadromous bipinnate fronds and rounded segment tips. It appears uniform morphologically, but apparently has cytological races. In Jalisco, it is presumably diploid, tetraploid, and hexaploid, judging from its usual 2n=76II and two sterile variants with 38II+38I and 38II+114I. Spore size is quite variable and may be correlated with different ploidy levels. Whereas most specimens have average spore diameters of 76–84 µm, perhaps representing the tetraploid, one specimen averaged only 70.1 µm (possibly the diploid) and three had spores averaging 87–93 µm (possibly the hexaploid). Anemia karwinskyana also crosses with A. hirsuta (meiotic count shows 152 univalents) in Jalisco.

  • Distribution

    Rare on moist banks in pine-oak woods; 600– 1900 m. Mexico.

    Mexico North America|