Anemia karwinskyana (C.Presl) Prantl
Descripción
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.A
Ejemplar revisado
Gro (Hinton 11338, NY). Hgo (Durata V. s.n., May 1978, FCME). Jal (Mickel 1368, NY). Méx (Mickel 710, NY; Rzedowski 20706, NY). Mich (King & Soderstrom 4863, NY). Mor (Lyonnet [520900005], MEXU). Nay (McVaugh 16509, NY). Oax (Conzatti 4369, US; Mickel 3993, NY).
Unverified, Doubtful, or Mistaken Reports. Hond (Meyer 9924, MO, cited by Moran & Mickel in Davidse et al., 1995, is A. guatemalensis Maxon).
A
Unverified, Doubtful, or Mistaken Reports. Hond (Meyer 9924, MO, cited by Moran & Mickel in Davidse et al., 1995, is A. guatemalensis Maxon).
A
Distribución
México (Country) endemicB
Elevación
600–1900 mA
Ecología y Hábitat
Rare on moist banks.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
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.A