Asplenium potosinum Hieron.
Descripción
Differs from A. miradorense by: rhizome scales shorter, 2–3.5 mm long, margins toothed; stipes gray-green to brownish gray, dull, narrowly alate (0.1–0.3 mm) to bases; blades each with a proliferous bud at apex; rachises brownish, dull, with green wings 0.5 mm wide, with tan appressed hairs 0.1–0.2 mm; pinnae reduced and sometimes sharply deflexed proximally, 15–25 mm long, median pinnae somewhat falcate, larger, 22–40 mm long, basiscopically excavate in the basal 1⁄3, with mostly simple serrations with sinuses less than 1(–3) mm deep; veins simple or 1-forked; sori in larger pinnae (6–)8–10 pairs per pinna, on both veins of a fork at bases of larger pinnae.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 42652, DS, MEXU; Croat 47618, LL, MEXU, MO). Col (Sanders 8548, UC; Vázquez 413, UC). Gro (Hinton 14705, ARIZ, MO, NY, US). Jal (Wilbur & Wilbur 1464, US). Nay (McVaugh 18984, CAS, IEB, MEXU, NY). Oax (Wendt et al. 4708, CAS, CHAPA, MEXU, MO). SLP (Pringle 3413, NY, UC). Sin (Gentry 5666, ARIZ, MO, NY, US). Ver (Bourgeau 2369, MO, NY, US).A
Elevación
550–2200 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species is most closely related to A. miradorense, differing in having more evenly serrulate acroscopic pinna margins, more numerous sori, and small-toothed rhizome scales. Some specimens, especially in western Mexico, also differ by the presence of small buds or plantlets arising from axils of subterminal pinnae. This is especially well developed on Hinton 14705 (US), with plantlets 6+ cm long. However, buds are absent on most specimens, including all those from Colima, San Luis Potosí, and Veracruz. Rzedowski & McVaugh 60 (ENCB), from Guerrero, has a plantlet at the tip of one of the blades, but has pinna dissection more like A. miradorense; we tentatively place it under A. potosinum. Other close relatives are A. barbaense, A. harpeodes, and A. pteropus.
Asplenium hesperium was said to differ from A. potosinum by the more strongly deflexed proximal pinnae, rounded pinna tips, proliferous rachises, and distribution in western Mexico. These differences do not seem to hold in Chiapas or in western Mexico either. Most specimens we have seen of A. hesperium have nonproliferous blades, including an isotype at UC. Both A. potosinum and A. hesperium agree in having small rhizome scales with occasional teeth, dull gray-green, slightly alate stipes, rather finely serrulate, acroscopic pinna margins, and numerous sori.
A
Asplenium hesperium was said to differ from A. potosinum by the more strongly deflexed proximal pinnae, rounded pinna tips, proliferous rachises, and distribution in western Mexico. These differences do not seem to hold in Chiapas or in western Mexico either. Most specimens we have seen of A. hesperium have nonproliferous blades, including an isotype at UC. Both A. potosinum and A. hesperium agree in having small rhizome scales with occasional teeth, dull gray-green, slightly alate stipes, rather finely serrulate, acroscopic pinna margins, and numerous sori.
A