Astrolepis sinuata (Lag. ex Sw.) D.M. Benham & Windham
Descripción
Rhizomes short, stout, compact, horizontal; rhizome scales 5–9 X 0.1 mm at bases, castaneous, often brown- to black-centered with age, linear, ciliate-denticulate, sinuous; fronds clumped, to 72(–100) cm long; stipes less than 1⁄4 the frond length, stout, terete, castaneous, densely clothed with white linear-lanceolate to deeply dissected-ciliolate scales; blades linear, pinnatepinnatifid; pinnae (14–)25–42 pairs, short-stalked to 3 mm, articulate, coriaceous, oblong, lobed ca. halfway to costae, each with 4–6 pairs of acute lobes; largest pinnae (near middle of blade) 12–20 X 6–10 mm, basal lobes with small basiscopic lobules; adaxial surfaces sparsely clothed with white, ciliolate to finely dissected substellate scales 0.5 mm long, the scale body 2–3 cells wide; abaxial surfaces densely clothed with white to reddish brown, linear-lanceolate, ciliolate scales overlying a dense tomentum of finely dissected hair-like scales and numerous short red-brown glandular hairs less than 0.1 mm; 2n=58 (USA); n=2n=87 (Jal, Zac, USA).A
Forma de vida
Rupícola.B
Ejemplar revisado
Ags (Rzedowski 25028, MEXU). BCN (Franklin 5800, NY). BCS (Carter 5743, MEXU). Chih (Freytag & Baxter 87, NY). Chis (Breedlove 26963, NY). Coah (Stanford et al. 105, NY). DF (Bourgeau 255, NY). Dgo (Correll & Johnston 20050, NY). Gro (Hinton 9724, NY). Gto (Rusby 6, NY). Hgo (Fisher 35368, NY). Jal (Palmer 633, NY). Méx (Rzedowski 30734, ENCB). Mich (Hitchcock & Stanford 7162, NY). Mor (Dunn & Dunn 18662, NY). Nay (Forman 1822, MICH). NL (Hinton 20074, MEXU). Oax (Mickel 4559, NY). Pue (Arsène 2051, MEXU). Qro (Rose 11532, NY). Sin (Breedlove 16433, NY). SLP (Pennell 17600, NY). Son (Gentry 1195, NY). Tam (Stanford et al. 663, NY). Ver (Purpus 9043, MO). Zac (Anderson 12614A, NY).A
Elevación
(400 –)1450 – 2700 mA
Ecología y Hábitat
Exposed limestone rocks and slopes, granite boulders, crevices in lava.A
Tipo de vegetación
Bosque de encino, Matorral espinoso, Selva medianaA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The inconspicuous dense glandular hairs of Astrolepis sinuata s.str., as well as the persistent, short, substellate scales of the adaxial pinna surfaces, distinguish this widespread species from the eglandular A. laevis, A. integerrima, and A. crassifolia. Specimens with very sparse glandular hairs may represent hybrids with these other three taxa (although parentage of the putative hybrids is unclear).
Benham and Windham (in FNA Ed. Comm., 1993) distinguished subsp. mexicana (western Texas and southeastern New Mexico, Mexico, and Central America) from subsp. sinuata in having 64 rather than 32 spores per sporangium, and averaging 37–44 µm rather than 50–65; these are here treated as cytotypes. A very large specimen from Guerrero (Fonseca & Velázquez 2475, MEXU, FCME, NY) reaches 1 m in length, and the pinnae are deeply cut and with 7 pairs of lobes.
A
Benham and Windham (in FNA Ed. Comm., 1993) distinguished subsp. mexicana (western Texas and southeastern New Mexico, Mexico, and Central America) from subsp. sinuata in having 64 rather than 32 spores per sporangium, and averaging 37–44 µm rather than 50–65; these are here treated as cytotypes. A very large specimen from Guerrero (Fonseca & Velázquez 2475, MEXU, FCME, NY) reaches 1 m in length, and the pinnae are deeply cut and with 7 pairs of lobes.
A