Argyrochosma palmeri (Baker) Windham
Descripción
Rhizomes short, compact, horizontal; rhizome scales lanceolate to linear-lanceolate, concolorous light brown, 3 mm long, entire; fronds to 15 cm long, clumped; stipes 1⁄10–1⁄6 the frond length; stipes and rachises black, terete, glabrous or with only very sparse farina; blades narrowly oblong, mostly bipinnate, to tripinnate at bases; pinnae 8–12 pairs, the proximal somewhat reduced; segments not articulate, mostly oblong, obtuse, the distal sessile, the proximal stalked and with the dark sclerotic color of stalks entering their bases; adaxial surfaces naked to sparsely whitefarinose, especially near margins; abaxial surfaces densely farinose; sori on nearly the whole length of the veins, segment margins plane to slightly recurved, not modified; sporangia 64-spored.A
Forma de vida
Rupícola.B
Ejemplar revisado
Dgo (Correll & Correll 20085, LL, NY). Gto (Correll & Correll 28817, LL, MEXU, MICH, US; Díaz B. & García 7181, IEB; Pray 3078, LAM; Zamudio 2523, IEB). SLP (only the type collection).
A
A
Distribución
México (país) EndémicoA
Elevación
2450 mA
Ecología y Hábitat
Rocky outcrops.A
Tipo de vegetación
Bosque de encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species closely resembles A. pallens in the oblong blades and short stipes, but differs in the blackish stipes and rachises and lack of scales on the rachises (vs. castaneous to dark castaneous stipes and rachises and the farinose-glandular rachises with a few small, reddish scales).A