Pelazoneuron patens (Sw.) A.R.Sm. & S.E.Fawc.
Descripción
Rhizomes erect, caudices 2–4 cm diam., apices and stipe bases covered with large, ovate, tan (whitish when young) scales to 1.5 X 0.5 cm, with cells isodiametric; fronds mostly 50–125(–250) cm long; stipes (5–)15–50(–95) cm X (1–)2.5–9(–12) mm; blades (8–)25–75(–100) cm long, tapering evenly toward apices; pinnae (3–)10–32 X (0.5–)1.2–3(–4) cm (excluding proximal segments, those sometimes elongate parallel to rachises or pinnatifid and auriculate to 5 cm long), the largest proximal or subproximal, usually deeply incised 0.7–0.9 the way to the costae; segments oblique, mostly 3–5 mm wide, subfalcate to falcate, acute; veins (6–)8–14(–21) pairs per segment, the proximal pair from adjacent segments running to sinuses; indument abaxially usually of numerous hairs mostly 0.2–0.4 mm long on costae, veins, and tissue between veins (occasionally hairs sparse or absent), also often with short-stipitate glands, scales absent on costae, blades adaxially glabrous except along costae; sori medial, with indusia tan, often stipitate-glandular, usually hairy; 2n=72 (Chis, Trin), 144 (CR, Jam).
A
A
Forma de vida
TerrestreA
Ejemplar revisado
(Related to the synonym Thelypteris patens) Camp (Martínez S. 28084, XAL). Chis (Case et al. 198, NY, UC). Gro (Lorea 1853, FCME). Hgo (Gimate 947, CHAPA, NY, UAMIZ). Mich (Rufino del Llano 86, IEB, UC). Oax (Hallberg 1677, NY, UC). Qro (Díaz B. & Carranza 6517, IEB, UC). QR (Chan 2605, CICY, XAL). Tab (Zamudio R. 203, IEB). Ver (Copeland herb. 26, MEXU, MICH, UC, US).
Unverified, Doubtful, or Mistaken Reports. NL (reported by Aguirre-Claverán and Arreguín-Sánchez, 1988, but not verified, specimen is probably misidentified). Tres Marías (reported by Lenz, 1995, but not verified, most likely misidentified).A
Unverified, Doubtful, or Mistaken Reports. NL (reported by Aguirre-Claverán and Arreguín-Sánchez, 1988, but not verified, specimen is probably misidentified). Tres Marías (reported by Lenz, 1995, but not verified, most likely misidentified).A
Elevación
100 – 1500 mA
Ecología y Hábitat
Along trails, river banks, and in shady canyons.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Thelypteris patens) The erect rhizomes and large, ovate, glabrous scales at rhizome apices and stipe bases distinguish this species from all other Mexican members of subg. Cyclosorus. Mexican specimens are referable to var. patens; var. smithiana Ponce occurs in the Antilles, Central America, and South America, and var. dissimilis (Schrad.) A. R. Sm. is confined to southern Brazil and perhaps adjacent countries.A