Pleopeltis rzedowskiana (Mickel) A.R.Sm. & Tejero

Primary tabs

Pleopeltis rzedowskiana (Mickel) A.R.Sm. & Tejero

Descripción

Rhizomes creeping, 3.5–5 mm diam.; rhizome scales reflexed, 2–3 X 0.5–0.8 mm, bicolorous, central stripe black, narrow, lumina visible, 0.1 mm wide, margins brown, thin, ruffled, erosedenticulate; fronds 30–58 cm long, distant; stipes 1⁄3–2⁄5 the frond length, reddish brown, non-alate, with appressed scales of various shapes, dark streak and broad thin margins; blades pinnatisect to pinnate, broadly ovate, 10–26 cm wide; pinnae 4–12(–18) pairs, linear-lanceolate, constricted toward base (2–4 mm wide) and dilated at rachises (sometimes more surcurrent or more decurrent), to 7–17 cm X (8–)10–12 mm, apices long-acuminate; adaxial surfaces glabrous; abaxial surfaces with scattered small, lanceolate, brown to black scales 0.5–1 mm long, hydathodes prominent, often in two rows on each side of costae; margins modified, clear, serrate to crenate or entire; apices entire; veins free, 3–4 forked, obscure; sori round, medial; sporangia glabrous; 2n=70 or 72 (Oax).A

Forma de crecimiento

Hierba

Forma de vida

Epífita, o Epipétrica. TerrestreA

Nutrición

Autotrófica

Ejemplar revisado

(Related to the synonym Polypodium rzedowskianum) Gro (Hinton et al. 11071, NY; Lorea 2062, NY; Rzedowski 18525, DS, 18605, NY). Jal (McVaugh 20399, IEB, NY). Oax (Geith 95-M040, NY; Hallberg 1454, 1455, NY; Mickel 6040, 6183, 6219, NY; Panero 5372, NY; Toriz 909, NY; Torres C. 11899, NY). Sin (Lehto 24391, ASU).A

Distribución

México (país) EndémicoA

Elevación

1200 – 1850(– 2150) mA

Tipo de vegetación

Bosque de neblina/mesófiloA

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

(In relation to the synonym) Polypodium rzedowskianum is a member of the P. plebeium complex but is distinct in its broad, long-acuminate pinnae that are conspicuously constricted at the bases.
This species has been misconstrued as P. pleolepis Maxon & Copel. (Mickel & Beitel, 1988), whose type closely resembles this species in pinna form. That species, however, is a synonym of P. bradeorum and is distinct in its orange-tan, weakly bicolorous rhizome scales (vs. strongly bicolorous, black-centered scales) and oblong to linear sori (vs. round).A

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]