Polypodium plesiosorum Kunze

Contenido

Descripción

Rhizomes long-creeping, 3–5 mm diam.; rhizome scales brown, ovate-lanceolate, entire, 3–5 mm long, tightly appressed, somewhat caducous and partially exposing green rhizomes; fronds (10–)15–65 cm long, distant; stipes 1⁄5–1⁄2 the frond length, stramineous to light brown, occasionally dark brown or atropurpureous, glabrous; rachises with dense hairs 0.1–0.3 mm long, at least adaxially; blades (narrowly oblong to) ovate-lanceolate, pinnatisect, 5–14(–19) cm wide; pinnae 10–29(–38) pairs, linear-deltate, 5–12 mm wide, equally dilated to slightly more surcurrent at bases, apices acuminate to acute or rounded, margins subentire to serrulate; abaxial surfaces with rare hairs 0.1–0.3 mm long only on costae, to densely hairy, hairs 0.1–0.3 mm on costae and veins; adaxial surfaces glabrous except for dense hairs 0.1–0.3 mm long on costae; veins netted (goniophlebioid), often casually so; sori round, medial, in one row each side of costa; sporangia glabrous; 2n=74 (SLP).A

Forma de crecimiento

Hierba

Forma de vida

Epipétrica, Epífita, TerrestreA

Nutrición

Autotrófica

Ejemplar revisado

Chis (Breedlove 28183, NY). Coah (Lyonnet 421000002, MEXU). DF (Schaffner 70, NY). Gro (Lorea 2268, US; Rzedowski & McVaugh 176, NY). Gto (Rzedowski 45457, IEB). Hgo (Dunn & Dunn 19030, NY). Jal (Rzedowski 27498, NY). Méx (Mickel 678, NY). Mich (Pringle 3354, NY). Mor (Lyonnet 2426, MEXU, US). Nay (McVaugh 16353, NY). NL (Palmer 1374, NY). Oax (Mickel 4473, NY). Pue (Ventura A. 220, NY). Qro (Fernández N. 3588, NY). SLP (Rzedowski 24461, NY). Tam (Stanford et al. 1066, NY). Ver (Avendano R. et al. 00044, NY).
Unverified, Doubtful, or Mistaken Reports. Sin (reported by Vega et al., 1995, but probably P. praetermissum).
A

Distribución

Centroamérica: Costa Rica PresenteA; El Salvador PresenteA; Guatemala PresenteA; Honduras PresenteA; Nicaragua PresenteA; Panamá PresenteA, México (país) Nativo y no endémicoA

Elevación

600 – 2800 mA

Tipo de vegetación

Bosque de neblina/mesófilo, Selva altaA

Categoría IUCN

No incluidaB

Categoría NOM-059-SEMARNAT-2010

No incluidaC

Estatus del taxón

(A) Como definida actualmente, probablemente una entidad natural (monofilética)

Discusión taxonómica

Polypodium plesiosorum is similar to P. rhodopleuron, but the latter has glabrous rachises and pinnae, and reddish stipes and veins. The abaxial surfaces in P. plesiosorum vary greatly from having only rare hairs to being densely hairy. Polypodium plesiosorum and its close relatives (P. rhodopleuron and P. colpodes) are distinct by their greenish rhizomes with tightly appressed scales. There is great variation in plant size and pinna apices. One specimen, for example, U. C. Bot. Gard. 57.420–1, Kennedy s.n. (UC), from Veracruz, has fronds 47–53 X 17–23 cm.A Variedades propuestas por Tejero-Díez 2004:
Polypodium plesiosorum var. plesiosorum Kunze, Linnaea 18: 313. 1845
Polypodium plesiosorum var. plesiolor Tejero, Anales Inst. Biol. Univ. Nac. Autón. México, Bot. 75(1): 24 (-28; f.1-3). 2004
Polypodium plesiosorum var. rubicundum Tejero, Anales Inst. Biol. Univ. Nac. Autón. México, Bot. 75(1): 28 (-31; f.3). 2004
D

Bibliografía

A. Mickel, J. T. & Smith, A. R. 2004: The Pteridophytes of Mexico Vol. 88

B. IUCN 2022: The IUCN Red List of Threatened Species. Versión 2022-2

C. SEMARNAT 2019: MODIFICACIÓN del Anexo Normativo III, Lista de especies en riesgo de la Norma Oficial Mexicana NOM-059-SEMARNAT-2010: 101 pp. – https://www.dof.gob.mx/nota_detalle.php?codigo=5578808&fecha=14/11/2019#gsc.tab=0 [accessed 2023-05-04 06:16]

D. Tejero-Díez, J. D. 2004: Notas taxonómicas y de distribución de Polypodium plesiosorum y P. rhodopleuron (Polypodiaceae: Pteridophyta). – Anales Inst. Biol., Univ. Nac. Autón. México, ser. Bot., 75(1): 11-37