Polypodium subpetiolatum Hk.
Descripción
Rhizomes creeping to long-creeping, 3–5 mm diam., often slightly glaucous; rhizome scales ovate-lanceolate to ovate-deltate, long-attenuate, entire, glabrous or comose, overlapping-cordate, 6–7 mm long; fronds 30–75 cm long, distant; stipes 1⁄3–2⁄5 the frond length, glabrous, stramineous, rarely brown; blades oblong-deltate or lanceolate, 1-pinnate, pinnatifid at apices, 7–23 cm wide; pinnae 16–28 pairs, linear-lanceolate, 9–18 mm wide, bases rounded to truncate, adnate only in upper part of blade, apices acuminate; abaxial surfaces glabrous with hairs 0.5 mm scattered on costae, veins, and margins; adaxial surfaces with rare to scattered white hairs; margins finely serrulate to crenulate to subentire; veins free or with occasional anastomoses; sori round to slightly oblong; sporangia not obviously setose but each with one or more short stubby hairs 0.1 mm long.A
Forma de vida
EpífitaA
Ejemplar revisado
Ags (Corres Z. 16106, GUADA, IEB). Chih (Correll & Gentry 22998, NY). Chis (Breedlove 22596, DS). Coah (Barkley et al. 7398, TEX). Col (Goldsmith 38, US). DF (Rusby 369, NY). Dgo (Breedlove 18737, NY). Gro (Rzedowski 26303, NY). Gto (Rzedowski 50559, NY). Hgo (Moore 5301, US). Jal (McVaugh 19605, NY). Méx (Rzedowski 30912, NY). Mich (Pringle 3328, NY). Mor (Lyonnet 892, MEXU, NY). Nay (Rose 2205, NY). NL (Hinton et al. 22197, NY). Oax (Mickel 3705, NY). Pue (Purpus 4038, NY). Qro (Rzedowski 48648, IEB). Sin (Breedlove 18357, NY). SLP (Pennell 17862, US). Tam (Trejo Avila s.n., 19 Oct 1985, UNL). Ver (Bourgeau 1038, NY).A
Elevación
1700 – 3100 mA
Tipo de vegetación
Bosque de encino, Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The characters used in Oaxaca (Mickel & Beitel, 1988) and Chiapas (Smith, 1981) treatments to distinguish P. subpetiolatum from P. adelphum (glabrous rhizome scales, free veins, and densely hairy adaxial costae) are not consistent and are found in varying combinations throughout the range of P. subpetiolatum. Some specimens from Chiapas have more cuneate pinna bases, and some specimens (also from Chiapas) have subconform terminal pinnae rather than strictly pinnatifid apices. Even in the type collection of P. adelphum both pinnatifid apices and subconform terminal pinnae occur.
This species varies in having pinnae subentire to coarsely toothed or crenate and subauriculate; some specimens have very narrow pinnae.
A
This species varies in having pinnae subentire to coarsely toothed or crenate and subauriculate; some specimens have very narrow pinnae.
A