Asplenium dissectum Sw.
Descripción
Roots fibrous, wiry, not proliferous; rhizomes creeping; rhizome scales blackish or dark brown, sparsely ciliate, subclathrate (lumina somewhat occluded), tips long-attenuate, mostly 3–6 X 0.2–0.5 mm, entire; fronds clumped, mostly 30–60 cm long; stipes gray-brown to atropurpureous, dull, 6–18 cm X 1–1.5 mm, 1⁄4–1⁄3 of frond length, with scattered to dense short (0.1–0.5 mm) glandular hairs and also attenuate or hair-like clathrate scales, not alate; blades thin-chartaceous, 25–50 X 5–12(–18) cm, 1-pinnate, lanceolate, bases not or only slightly reduced, apices gradually reduced and pinnatifid, not radicant; rachises atropurpureous, dull to sublustrous, with numerous attenuate to hairlike scales, not winged; pinnae narrowly lanceolate, 25–60 pairs per frond, 3–9 cm X 6–10 mm, less than 5 mm wide in distal 1⁄2, stalked to 1 mm, bases inequilateral, excised and narrowly cuneate basiscopically, truncate and sometimes slightly auriculate acroscopically, apices long-attenuate, margins lacerate or often bilacerate (longer teeth shallowly notched) with sharp angled teeth; veins evident on both sides, mostly 1-forked, 2-forked at bases, simple toward pinna tips, diverging at ca. 10° angle from the costae; indument abaxially of scattered brownish stellate scales mostly 0.1–0.5 mm long on and between veins, the larger ones with attenuate tips and fringed bases; sori 4–10 pairs per pinna, on both sides of midveins, almost parallel to and appearing borne on the pinna midribs; indusia red-brown, 1.5–3 X 0.3–5 mm, margins entire; spores reniform.A
Forma de vida
EpífitaA
Ejemplar revisado
Oax (Mickel 1057, ENCB, ISC, US, 5728, 5741, 7095, NY).A
Elevación
1200–1450 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Among the 1-pinnate members of sect. Sphenopteris (scaly rachises and sori at narrow angles with respect to the costae and costules), the thin blade texture, deeply lacerate or bilacerate pinnae, pinnatifid and very gradually tapering blade apices, more numerous pinna pairs, and glandular hairs on the stipes readily distinguish A. dissectum from A. serra, the closest Mexican relative.A