Asplenium juglandifolium Lam.
Descripción
Roots coarse, fibrous, not proliferous; rhizomes short-creeping to suberect; rhizome scales conspicuous, clathrate, iridescent, lumina not occluded, uniseriate at tips and contorted distally, 5–12 X 0.5–0.7 mm, entire; fronds few (often ca. 2–4), clustered, 35–90 cm; stipes brown or purplish brown, dull, 12–25 cm X 2–4 mm, 1⁄3–2⁄3 the frond length, with rare whitish to light tan clavate hairs, not winged; blades thick-herbaceous, yellowish green, deltate-ovate, 1-pinnate, 30–55 X 18–30 cm, each with a X conform terminal pinnae; rachises tan to stramineous or greenish, dull to sublustrous, glabrous, flattened or angled, but not winged; pinnae lanceolate to falcate, 2–8(–12) pairs, 10–17 X 1.5–3 cm, stalked to 4 mm, bases inequilateral, broadly to sometimes narrowly cuneate at bases, sometimes inequilaterally so (acroscopic side broader and more broadly cuneate, at least on distal pinnae), attenuate at apices, margins slightly sinuate to entire; veins mostly 2(–3)-forked, evident on both sides of blades, tips conspicuous adaxially; indument abaxially of scattered whitish to tan, appressed, clavate hairs 0.1–0.3 mm long; sori 7–14 pairs per pinna, on both sides of midveins; indusia 8–25 X 0.8–1 mm, margins entire; spores reniform; 2n=288 (Trin).A
Forma de vida
EpífitaA
Ejemplar revisado
Chis (Breedlove 32947, DS, MEXU, 48327, CAS, ENCB, 48360, CAS; Martínez S. 17617, XAL; Purpus 7249, BM, MO, NY, UC, US; Rovirosa 1044, PH).
A
A
Elevación
500–950 mA
Ecología y Hábitat
In lower montane.A
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Tryon and Stolze (1993) synonymized A. falcinellum and gave good reasons for doing so; Adams (in Davidse et al., 1995) followed suit. The reputed differences between the two species do not hold upon examination of specimens from throughout the range.
Breedlove 33375 (DS), from Chiapas, at 350 m, is close to A. juglandifolium, but the fronds are very small (ca. 20 cm long) with only 2–4 pairs of lateral pinnae, and the pinnae are shallowly crenate. It could be a hybrid or merely a small variant of A. juglandifolium.
A
Breedlove 33375 (DS), from Chiapas, at 350 m, is close to A. juglandifolium, but the fronds are very small (ca. 20 cm long) with only 2–4 pairs of lateral pinnae, and the pinnae are shallowly crenate. It could be a hybrid or merely a small variant of A. juglandifolium.
A