Dryopteris futura A.R.Sm.
Descripción
Rhizomes erect; rhizome scales concolorous, brown to tan, dull to somewhat lustrous, 10–25 X 2–5 mm, ovate-lanceolate, margins entire or with minute glands; fronds 45–110 cm long; stipes stramineous to light brown at bases, 25–50(–70) cm X 4–5 mm, 1⁄2–2⁄3 the frond length, bases with numerous scales similar to those of rhizomes, glabrous distally; blades thin-herbaceous, green, broadly deltate, 3–4-pinnate-pinnatifid proximally, otherwise 2–3-pinnate-pinnatifid, 20–40 X 20–35 cm, with pinnae opposite (proximally) to subopposite or alternate (distally), ascending 45–70° from rachises, 10–12 pairs; rachises stramineous, lacking scales, eglandular or sparsely glandular; proximal pinnae the longest, broadly deltate, strongly inequilateral, 13–25 X 8–17 cm, stalked 0.8–1.5 cm, pinnules to ca. 12 pairs per pinna, with larger basiscopic basal pinnule 6–12 cm long, acroscopic basal pinnule much shorter (10–15 mm long); distal pinnae sessile or stalked to 5 mm, slightly basiscopically developed or nearly equilateral, segment margins denticulate; indument abaxially absent or of sparse to moderate stipitate-glands 0.1 mm long on costae, costules, veins, and sometimes between veins, adaxially the blades glabrous; sori submarginal, indusia tan to red-brown, 0.6–1 mm diam., flat, glabrous or margins stipitate-glandular; 2n=82(Chis).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 32058, DS, FCME, 55907, 65730, CAS; Fraser-Jenkins 13184, UC; Mendoza-Ruiz 239, UAMIZ). Gro (Lorea 1638, FCME, IEB, NY, 2299, 4541, FCME, IEB; Martínez S. 1121, MEXU). Hgo (Lyonnet 510900007, MEXU).A
Elevación
(1750 –)2500 – 2800 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Dryopteris futura differs from congeners in Mexico by having broadly deltate, 3–4-pinnate-pinnatifid blades, with proximal pinnae ascending and much more strongly developed on the basiscopic side than the acroscopic side. The closest ally is D. nubigena. Both D. futura and D. nubigena are uncommon or at least poorly collected.A