Adiantum feei T. Moore ex Fée
Descripción
Rhizomes short-creeping, ca. 3–6 mm diam.; rhizome scales dark brown to atropurpureous, blackish with age, 2–4 X 0.3–0.5 mm, margins entire; fronds clumped, (20–)35–100+ cm long, arching or scandent; stipes atropurpureous, lustrous, ca. 1⁄2 the frond length, with stiff, erect, uniform reddish hairs ca. 0.1–0.2 mm long; blades ovate to ovate-lanceolate, 3–4-pinnate proximally, 15–30 cm wide, gradually tapering towards apices; rachises atropurpureous, often flexuous or zig-zag, with dense, stiff, reddish hairs 0.1–0.2 mm long; pinnae 6–8 compound pairs per blade, alternate, stalked 1–2 mm long; pinnulets flabellate to rhombic or orbicular, 7–12 mm long and broad, bases cuneate to rounded, margins incised-lobate, stalk color stopping ± abruptly at pinnulet bases, articulate; veins free, forking, ending at the thickened cartilaginous pinnulet margins; indument adaxially on costae, costules, and pinnulet stalks of dense, stiff, reddish hairs 0.1–0.3 mm long, abaxially the pinnulets glandularhirsute with stiff to flexuous pale hairs 0.2–0.5 mm long on the veins; idioblasts absent; sori 2–6 per pinnulet, confined to distal margins; indusia 1–3 mm long, oblong to often lunate or reniform, glabrous.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 21160, DS, MO, 23179, DS, NY, 53164, 56188, CAS, ENCB). Oax (Mickel 1608, ISC, UC, US, 4839, ENCB, NY, UC, US). Qro (Carranza 4608, IEB, MEXU, UAMIZ; González P. 690, IEB, MEXU). Tam (Sharp et al. 50103, US). Ver (Palacios-Rios 3507, XAL; Schaffner 446, K).A
Ecología y Hábitat
Among rocks on shrubby trailsides.A
Tipo de vegetación
Bosque de pino-encino, 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)A
Discusión taxonómica
This species is by far most commonly collected in Chiapas, with nearly 30 collections seen; fewer than half this number of collections are known from elsewhere in Mexico, where the species appears to be rare or very local. The flexuous, densely hairy rachises, costae, costules, and pinnulet stalks distinguish this species from all others in Mexico. It has the peculiar habit, for a maidenhair, of scrambling over low brush.A