Pleopeltis madrensis (J.Sm.) A.R.Sm. & Tejero
Descripción
Rhizomes creeping, 3–5 mm diam.; rhizome scales strongly bicolorous, spreading, 2.5–3 mm long, each with a black narrow central streak and margins broad, thin, tan to brown, ruffled, erose-denticulate; fronds 18–40 cm long, subdistant; stipes 1⁄2 the frond length, dark castaneous to atropurpureous, with scattered lanceolate scales similar to those of rhizomes; rachises with scattered bicolorous scales with central black streak; blades pinnatisect, oblong to narrowly deltate, not reduced proximally, 4–8(–9) cm wide; pinnae 7–18 pairs, to 3–4 cm X 2–3 mm, linear, apices obtuse, crenulate distally; abaxial surfaces with conspicuous round scales 0.5 mm diam., varying to acicular scales 1 mm long, serrulate, pale, each with dark point of attachment; adaxial surfaces glabrescent, with hydathode pits often in double row near pinna bases; veins free, not visible; sori round, medial; sporangia glabrous.A
Forma de vida
EpífitaA
Ejemplar revisado
(Related to the synonym Polypodium madrense) Ags (Correa 172, MICH). Chih (Correll & Gentry 23100, LL). Col (Goldsmith 43, US). DF (Rusby 330, NY). Dgo (Keil 8877, NY). Gro (Rzedowski 26301, NY). Gto (Ventura y López 9318, IEB). Hgo (Breckon et al. 2323, NY). Jal (McVaugh 25915, NY). Méx (Mickel 671, NY). Mich (Pringle 3351, NY). Mor (McPherson 962, NY). Oax (Mickel 4062, NY). Pue (Díaz Luna 4939, UC). Qro (Rzedowski 45739, MEXU). Sin (Gentry 7223, US). SLP (Parry & Palmer 973, NY). Tlax (Hernández X. 430, US).
Unverified, Doubtful, or Mistaken Reports. Ver (Nee & Taylor 25896, F, NY; Ventura 10281, ENCB, MO, both cited by Palacios-Rios, 1992, but the former is P. plebeium and the latter not verified but probably also P. plebeium).A
Unverified, Doubtful, or Mistaken Reports. Ver (Nee & Taylor 25896, F, NY; Ventura 10281, ENCB, MO, both cited by Palacios-Rios, 1992, but the former is P. plebeium and the latter not verified but probably also P. plebeium).A
Distribución
México (país) EndémicoA
Elevación
1800 – 3250 mA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym) Polypodium madrense closely resembles P. plebeium but is distinct by its long-attenuate, contorted blade scales (vs. scales small, ovate-lanceolate, and appressed), narrower pinnae, held perpendicular to the rachises (vs. distal pinnae somewhat ascending), and by its occurrence at higher elevations of 1800–3250 m (vs. (450–)1000–2800 m).A