Athyrium tejeroi Mickel
Descripción
Rhizomes short-creeping, 3 mm diam.; rhizome scales light brown, narrowly deltate, with long-acuminate apices, the margins entire, to 4 X 0.5 mm; fronds approximate (2–4 mm distant) to 60 cm long; stipes ca. 1⁄3 frond length, stramineous, adaxially grooved, with sparse linear scales similar to those of rhizomes and appressed septate hairs 0.2–0.5 mm long (mostly on abaxial surface); blades tripinnate-pinnatifid, broadly deltate, to 30 cm wide, with 15–18 pairs of free pinnae, the blade apices shortly attenuate; rachises subflexuous, stramineous, slightly alate, with scattered hairs similar to those of stipes mainly on abaxial surface; pinnae alternate, narrowly triangular, ascending, the basal ones to 19 X 10 cm, texture herbaceous, abaxial surface with appressed hairs 0.1–0.2 mm long, adaxial surface glabrous; veins pinnate, ending in the teeth; sori one per ultimate segment, 1–1.5 mm long, elongate, J-shaped, or round; indusia 0.2–0.4 mm wide, whitish, coarsely toothed.A
Forma de vida
TerrestreA
Ejemplar revisado
Known only from the type collection. OAX (Tejero-Díez 2919, IZTA, NY).A
Distribución
México (Country) endemicB
Elevación
1500 mA
Tipo de vegetación
Bosque de encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species is similar to A. palmense in the slender rhizomes, the thin blade texture, and the indusium deeply lacerated into 2–4 teeth, but differing in the blades being 3-pinnate-pinnatifid rather than 2-pinnate-pinnatifid; from A. skinneri differing in pinnate-pinnatifid blades. With increasing dissection, there is increasing frond size: A. skinneri to 44 cm long with 5–7 pairs of pinnae, A. palmense to 53 cm long with 12–15 pairs, and A. tejeroi to 60 cm with 15–18 pairs.A