Notholaena schaffneri (E.Fourn.) Underw. ex Davenp.
Descripción
Rhizomes compact, horizontal, ca. 2 mm diam.; rhizome scales linear-lanceolate, 2–3 mm long, concolorous, black, sclerotic, lustrous, margins ciliate-denticulate; fronds 8–26 cm long, clumped; stipes 1⁄8–1⁄6 the frond length, atropurpureous, with linear-lanceolate, castaneous, ciliate-denticulate scales 1.5–3 mm, bristle-like hairs ca. 1 mm long in addition to farina; blades narrowly elliptic, 2–4 cm wide, reduced proximally, bipinnate pinnatifid, the segments cut only 1⁄2 way to the costae, coriaceous; pinnae to 24 pairs; adaxial surfaces with sparse glands; abaxial surfaces densely covered with white farina glands and long, bristle-like, castaneous hairs on costae and costules; laminar margins somewhat curved; spores tan to black; 2n=60 (Oax), 120 (NL).A
Ejemplar revisado
Coah (Johnston & Muller 205, US). DF (Schaffner 30, in 1875, NY). Dgo (Sánchez S. 754, MEXU, US). Gro (Frye & Frye 3145, US). Gto (Galván 2664, MEXU). Jal (McVaugh 17317, NY). Mich (Torres & Ramírez 13601, IEB). NL (Orcutt 1304, US). Oax (Mickel 4084, NY). Pue (Purpus 3146, NY). SLP (Schaffner 962, GH, NY). Tam (Bartlett 11007, DS, US). Ver (Purpus 6199, NY). Zac (Rose 2662, US).
Unverified, Doubtful, or Mistaken Reports. Ags (Siqueiros 4291, HUAA, and one other collection, cited by Siqueiros-Delgado & González-Adame, 2004 [as Cheilanthes potosina], but not verified). Mor (Dixon 61, MEXU, cited by Riba et al., 1996, but not verified).
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Unverified, Doubtful, or Mistaken Reports. Ags (Siqueiros 4291, HUAA, and one other collection, cited by Siqueiros-Delgado & González-Adame, 2004 [as Cheilanthes potosina], but not verified). Mor (Dixon 61, MEXU, cited by Riba et al., 1996, but not verified).
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Elevación
(300 –)1450 – 2100 mA
Ecología y Hábitat
Dry, rocky slopes, among shaded rocks, wooded ravines, shrub-covered hills, shaded ledges.A
Tipo de vegetación
Matorral crassicauleB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species can be distinguished from N. galeottii by having farina on both surfaces of the pinnae and scattered, brown, terete, hair-like scales on the costae and veins (glabrous to hirsute adaxial pinna surfaces, abaxial pinna surfaces with broad, pinnatifid, brown scales in N. galeottii).
Notholaena nealleyi appears to be only a diminutive form of N. schaffneri. Notholaena nealleyi is said to differ by the pinnae having only 1–3 pairs of free pinnules per pinna, vs. 4–6 in true N. schaffneri. However, Windham (in FNA Ed. Comm., 1993) treated Notholaena nealleyi as distinct and reported that N. nealleyi may represent a tetraploid hybrid between N. schaffneri and an unknown taxon. More work is needed.
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Notholaena nealleyi appears to be only a diminutive form of N. schaffneri. Notholaena nealleyi is said to differ by the pinnae having only 1–3 pairs of free pinnules per pinna, vs. 4–6 in true N. schaffneri. However, Windham (in FNA Ed. Comm., 1993) treated Notholaena nealleyi as distinct and reported that N. nealleyi may represent a tetraploid hybrid between N. schaffneri and an unknown taxon. More work is needed.
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