Athyrium palmense (Christ) Lellinger
Description
Similar to A. skinneri except: rhizome and stipe base scales 4–5 X 0.5–1 mm; stipes 23–25(–30) cm long, 1⁄2 the frond length; blades bipinnate-pinnatifid, 23–28 X 12–28 cm, deltate; rachises with rare to sparse hair-like scales; largest pinnae 8–17 X 3.5–9 cm, wings along adaxial costae and segment midribs conspicuous, 0.1 mm wide, along almost entire length of axes; sori mostly hamate to round; indusia 0.5–0.8(–1) X 0.3–0.5 mm, coarsely dentate.A
Forma de vida
TerrestreA
Specimen
Col (Vázquez & Phillips 942, UC, UCR). Dgo (Ibana García 647, US). Gro (Lorea 2536, MEXU). Jal (McVaugh 16203, US). Méx (Hinton 4941, NY, US). Mich (Pringle 13706, US). Mor (Lyonnet 2578, MEXU, US). Nay (McVaugh 16345, MEXU, NY, US). Oax (Mickel 6124, NY, UC). Qro (Carranza G. 2266, IEB). Sin (Ortíz C. et al. 257A, MEXU).A
Altitude
400 - 2300 mA
Habitat & Ecology
In moist woods on Pacific side, mostly middle elevations.A
Tipo de vegetación
Bosque de neblina/mesófilo, Bosque de pino, Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discussion
Athyrium palmense is found primarily at higher elevations than is A. skinneri, though it occupies roughly the same geographical distribution; the mixed collections in Oaxaca (Mickel 3946, 6124, 6992, NY) are from 750–850 m. The deltate blades, larger pinnae, shorter sori, and distinctive costal wings appear to correlate with the bipinnate-pinnatifid nature of the fronds, and separate A. palmense from A. skinneri.A