Asplenium alatum Humb. & Bonpl. ex Willd.
Descripción
Roots wiry, fibrous, not proliferous; rhizomes erect; rhizome scales brown, 1–3 X 0.8 mm, entire; fronds clumped, 20–60 cm long; stipes gray-brown to green, 3.5–8(–10) cm X 1–2.5 mm (not including wings), 1⁄5–1⁄3 of frond length, glabrous or with rare scales, broadly winged 1–2.5 mm nearly to bases; blades thickherbaceous, linear-lanceolate, 1-pinnate, 14–25(–40) X 5–8(–10) cm, proximal 1 or 2 pinna pairs reduced, each blade terminating in a prolonged rachis with a bud at the tip; rachises brownish, glabrous, broadly winged ca. 1–2 mm from base to bud at the tip of the prolonged rachis; pinnae lanceolate, 10–22 pairs, 3.5–6 X 1–1.8 cm, bases equilateral, truncate, exauriculate, apices obtuse or acute, margins biserrate; veins 1- or 2-forked, tips prominent adaxially; indument of scattered, tan, appressed clavate hairs 0.1 mm long; sori 7–14 pairs per pinna, on both sides of costae; indusia 3–8 X 0.3–0.5 mm, margins entire; spores reniform; 2n=72 (Jam).A
Ejemplar revisado
Chis (Breedlove 34685, 35400, 38952, DS, MO, 49720, CAS, ENCB). Oax (Mickel 6577, NY, UC, 6714, ENCB, MEXU, NY, UC). Ver (Barrington 442, MEXU; Copeland herb. 62, MEXU, UC, US; Ventura A. 342, ARIZ).A
Elevación
1150–2700 mA
Ecología y Hábitat
On the Atlantic slope.A
Tipo de vegetación
Selva mediana, Selva altaA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
The broadly alate, gray-brown rachises and stipes, proliferous blade apices, and small rhizome scales distinguish A. alatum from congeners in Mexico. The most similar species morphologically is A. pteropus. An even closer relative from Costa Rica to Ecuador is A. rosenstockianum Brade, which differs by having simple, rather than 1-forked veins in the pinnae. A