Pellaea atropurpurea (L.) Link
Descripción
Rhizomes short, compact, to 8 mm diam.; rhizome scales 5–6 X 0.3 mm, linear, dark orange, concolorous, dull, subentire with occasional teeth, tortuous; fronds to 50 cm long, subdimorphic; stipes 1⁄4–1⁄2 the frond length, terete, atropurpureous, pubescent with scattered white hairs of two lengths,1–2 mm long and 0.1 mm long; blades elongate-deltate, to 25 X 18 cm, 2-pinnate or rarely 1-pinnate, gray-green; pinnae petiolate to 15 mm, articulate, pinnule stalks dark, stopping at bases of pinnules, apices acute to rounded, distal pinnae entire, proximal ones pinnate, slightly pubescent along abaxial costae with 1–2 mm long hairs, 1 to several pairs of pinnules, ultimate segments linear, entire, subcoriaceous, ultimate pinnules on proximal pinnae 30–40 X 4 mm; fertile margins recurved, thin at edges, indusia 0.1 mm with entire margins, sori elongate about 2 mm along ends; spores tan; n=2n=87 (Canada, USA, NL).A
Forma de vida
TerrestreB
Ejemplar revisado
Chih (Soderstrom 887, LL). Chis (Breedlove 37179, DS, NY). Coah (Stanford et al. 391, US). Jal (Iltis et al. 29515, WIS). NL (Mueller & Mueller 362, US). Oax (Mickel 6314, NY). Pue (Arsène 3548, GH). SLP (Burgess 5406, ARIZ). Son (Hartman 357, NY, US). Tam (Stanford et al. 943, US). Ver (Bourgeau 3068, NY). Zac (Johnston et al. 11565A, LL p.p.).
Unverified, Doubtful, or Mistaken Reports. Ags (González-Adame 77, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).A
Unverified, Doubtful, or Mistaken Reports. Ags (González-Adame 77, HUAA, cited by Siqueiros-Delgado & González-Adame, 2004, but not verified).A
Elevación
1500 – 2500 mA
Ecología y Hábitat
Limestone cliffs.A
Tipo de vegetación
Bosque de encinoB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Pellaea atropurpurea is distinct by its dark axes, pinnate pinnae, and concolorous rhizome scales.
There is considerable variation within Pellaea atropurpurea, and perhaps some of the atypical specimens reflect hybridization with P. notabilis. Windham (pers. comm.) has suggested that Pellaea atropurpurea has crossed with P. notabilis, the hybrid appearing much like the former species, but distinct in having the rachises ciliate abaxially, whereas P. atropurpurea has the rachises glabrous abaxially (though ciliate adaxially). Gastony and Windham (1989) reported a tetraploid apogamous plant, 2n=116, that is a probable hybrid between triploid P. atropurpurea and diploid P. notabilis.A
There is considerable variation within Pellaea atropurpurea, and perhaps some of the atypical specimens reflect hybridization with P. notabilis. Windham (pers. comm.) has suggested that Pellaea atropurpurea has crossed with P. notabilis, the hybrid appearing much like the former species, but distinct in having the rachises ciliate abaxially, whereas P. atropurpurea has the rachises glabrous abaxially (though ciliate adaxially). Gastony and Windham (1989) reported a tetraploid apogamous plant, 2n=116, that is a probable hybrid between triploid P. atropurpurea and diploid P. notabilis.A