Cheilanthes leucopoda Link
Descripción
Rhizomes compact, horizontal, 4–10 mm diam.; rhizome scales linear, concolorous, dull orange-tan, entire; fronds to 35 cm long, clumped; stipes ca. 2⁄3 the frond length, stramineous, grooved distally, with a few scales at base, also with abundant patent hairs 0.5–1 mm long; blades broadly pentagonal, 4-pinnate, 5–15 cm wide; rachises grooved adaxially; basal pinnae strongly inequilateral, the basal basiscopic pinnules greatly exaggerated, costae green to stramineous; ultimate segments oblong to lanceolate, not bead-like, the largest 3–5 mm; adaxial and abaxial surfaces with scattered stiff hairs similar to those on the axes; segment tips curved and weakly differentiated as false indusia, sori discontinuous, concentrated on apical and lateral lobes; sporangia 32-spored; spores dark brown; 2n=60 (NL, USA).A
Forma de vida
TerrestreB
Ejemplar revisado
Chih (Pringle 442, NY). Coah (Stanford et al. 82, NY). Dgo (Iltis & Lasseigne 135, NY). Gto (Ventura & López 8998, MEXU). Hgo (Chase 7234, NY). NL (Hinton et al. 21182, ARIZ; Pringle s.n., 20 Jun 1888, NY). Qro (Rzedowski 46443, MEXU). SLP (Purpus 4879, NY). Tam (Stanford et al. 2123, NY).
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Elevación
(150 –)1000 – 2250 mA
Ecología y Hábitat
Rocky slopes and ledges, apparently confined to limestone.A
Tipo de vegetación
Selva baja, Bosque de pino, Bosque de pino-encino, Matorral espinoso, Matorral micrófiloB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Cheilanthes leucopoda has 32 spores per sporangium but is a sexual diploid (Windham & Rabe in FNA Ed. Comm., 1993). This species is distinct in its broadly deltate hairy blades with stramineous axes. Molecular evidence (Cranfill, unpubl.) suggests a relationship with C. aurea in Notholaena, though it lacks the farina of that species. A