Dennstaedtia cornuta (Kaulf.) Mett.
Descripción
Rhizomes short-creeping, unbranched, 1–4 cm diam.; fronds 1.5–3.5 m long, to 4 cm distant; stipes ca. 1⁄2 the frond length, stramineous, each with 1(–2) buds at base; blades 3–4-pinnate, deltate; proximal pinnae opposite, subsessile, buds frequently in axils of pinnae, basal pinnules reduced; apical segments separate to pinna tips; laminae glabrous to pubescent abaxially, especially on axes, hairs whitish, subappressed, ascending and more or less curled; sterile vein ends clavate; vertical wings absent adaxially; sori distant along segment margins; indusia purse- to cup-shaped, much wider than deep, 1–1.3 mm wide, 0.3 mm deep; 2n=92 (Oax), 94 (Chis).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 32210, 33443, 33686, NY; Ghiesbreght 368, NY). Gro (Lorea 2347, MEXU). Oax (Hallberg 1751, NY; Mickel 1519, 5353, 6565, 6748, NY). Ver (Copeland herb. 71, UC).
A
A
Elevación
(220 –)900 – 2450 mA
Tipo de vegetación
Selva alta, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Dennstaedtia cornuta is distinguished by its clavate vein ends and broad indusia. This species has previously been treated as D. dissecta (Sw.) T. Moore, which Navarette and Øllgaard (2000) restricted to the Antilles, Costa Rica, Panama, and the Andes. They distinguished D. cornuta from D. dissecta by the latter having rhizomes creeping or subterranean and roots on the stipe bases (vs. rhizomes ascending and roots absent from the stipe bases in D. cornuta). Unfortunately, rhizomes and stipe bases are rarely present on herbarium specimens, so the characters are of limited practical value.A