Asplenium cruegeri Hieron.
Descripción
Roots thin, fibrous, not proliferous; rhizomes suberect; rhizome scales brown, clathrate, 3–4 X 0.2–0.4 mm, entire; fronds tightly clustered, 10–15(–25) cm long; stipes brownish to brown-purple, dull, 2–5(–10) cm long, 1⁄4–1⁄3 of frond length, glabrous, adaxially with green wings 0.1–0.2 mm wide; blades thin-chartaceous, 1-pinnate, oblong-lanceolate, 8–20 X (2–)2.5–3.5 cm, not or only slightly reduced proximally, apices pinnatifid, not proliferous; rachises tan to greenish 2⁄3 of length, glabrous, adaxially with very narrow green wings 0.1–0.2 mm wide; pinnae 15–20(–25) pairs, 1.4–1.8 X 0.5–0.8 cm, sessile to short-stalked to 1 mm, pinna bases inequilateral, dimidiate, slightly auriculate acroscopically, apices obtuse, margins subentire basiscopically, crenulate to bicrenulate acroscopically and at tips; veins 1(–2)-forked acroscopically, simple basiscopically, tips evident adaxially; indument abaxially of scattered, appressed, whitish to light tan, clavate hairs 0.1–0.2 mm long on tissue between veins; sori 6–10 per pinna, 2–4 on basiscopic sides, 4–6 on acroscopic sides; indusia 2–4 X 0.5–0.8 mm, margins subentire; spores reniform.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 39059, DS, ENCB, NY).A
Elevación
1000 mA
Tipo de vegetación
Bosque de encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This is closely related to A. claussenii Hieron., widespread in South America from Colombia and Venezuela to Brazil and Paraguay, and A. hostmannii Hieron. (Hedwigia 60: 256. 1918), from northern South America (Venezuela, Guianas, and Brazil). It belongs to the A. miradorense group and is distinguished from other Mexican species by the smaller number of pinna pairs, generally 15–20 per blade, and pinnae rounded at tips, more or less entire along the basiscopic margins, shallowly crenate or toothed along acroscopic margins. The veins are 1-forked in the proximal half of the pinnae and simple toward the tips. From A. laetum, it differs by the erect rhizomes, blunt-tipped and shorter pinnae, and greater number of pinna pairs per blade. Adams (in Davidse et al., 1995) referred the Chiapas specimen cited here to A. hostmannii, which differs by the more coarsely dentate, or often bidentate pinna margins and more tapering pinnae (isolectotype Hostmann 168, K, photo UC!). He also cited specimens of A. hostmannii from Guatemala and Panama, as well as from northern South America, but it is not clear whether he regarded A. cruegeri as a synonym. Both species were published in the same paper by Hieronymus.A