Cheilanthes arizonica (Maxon) Mickel
Descripción
Rhizomes compact, horizontal, 2–3 mm diam.; rhizome scales linear-lanceolate, lustrous, bicolorous black, with narrow brown margins; fronds to 30(–50) cm long, clumped; stipes 1⁄2–2⁄3 the frond length, castaneous to dark brown, grooved, glabrous; blades ovate to deltate, 3–4-pinnate-pinnatifid, 4–10 cm wide; pinnae 5–10 pairs, most equilateral, basal pair conspicuously larger than adjacent pair, inequilateral, proximal basiscopic pinnules exaggerated; ultimate segments elliptic to linear-oblong, not bead-like, the largest 4–10 mm long; adaxial surfaces glabrous; abaxial surfaces with scattered to rare, minute, 1-celled hairs, in northern part of range as reddish, scattered, sessile glands; laminar margin recurved and strongly differentiated, 0.2–0.5 mm wide, covering most of the abaxial surface with short, regular, marginal papillae (0.1 mm long), not decurrent; sori more or less continuous around segment margins; sporangia 32-spored; spores brown to grayish brown; n=2n=90, apogamous (USA).
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A
Forma de vida
Rupícola, TerrestreB
Ejemplar revisado
Chih (Knobloch 654, DS, MSC). Chis (Breedlove 29955, NY). Coah (Wendt & Alemcowicz 521, LL, TEX). Dgo (Palmer 150, NY). Hgo (Breedlove 59484, CAS). Jal (Koch & Fryxell 89200, NY). Méx (Tejero-Díez, 2839, IZTA, NY). Mich (Madrigal Sánchez 2687, IEB). Nay (Rose 2211, NY p.p.). NL (Muller 2845, LL, UC, US). Oax (Mickel 5263, NY). Qro (Carranza 2862, IEB). Sin (Breedlove 18570, NY). Son (Phillips 642, ARIZ, 674, ARIZ; White 4323, NY). Zac (Fitzner s.n., 31 July 1970, MSC).
Unverified, Doubtful, or Mistaken Reports. Gro (Lorea 2742, FCME, cited by Lorea-Hernández & Velásquez M., 1998, but not verified).
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Unverified, Doubtful, or Mistaken Reports. Gro (Lorea 2742, FCME, cited by Lorea-Hernández & Velásquez M., 1998, but not verified).
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Elevación
(800 –)1750 – 2700 mA
Ecología y Hábitat
Rocky slopes and ledges, shady ravines, commonly on igneous substrates.A
Tipo de vegetación
Bosque de encino, Bosque de pino-encino, Selva bajaB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The non-decurrent indusia with glabrous surfaces and regular, short-papillate margins distinguish this taxon from C. marginata and C. pyramidalis (decurrent to long-decurrent, long-papillate indusial margins), C. complanata (long- or nondecurrent, entire indusia), and C. membranacea (see key for characters). Cheilanthes lerstenii was described from Oaxaca, but the only character separating it is the presence of reddish glands in specimens from the southwestern United States and northernmost Mexico. Collections from further south have the same 1-celled glandular hairs, though they are inconspicuous. The color and abundance of these glands seem to be clinal, so the two species are here treated as one.A