Hypolepis Bernh.
Descripción
Thicket-forming; rhizomes long-creeping, much branched from the leaf bases, hairy; fronds mostly large, often scandent, 2–4-pinnate, generally hairy, rarely glabrous; stipes stramineous, atropurpureous or castaneous, hairy to glabrous, spiny or not; laminae herbaceous to coriaceous, glabrous to hairy; veins free; sori marginal (to rarely medial), round to oblong, generally protected by differentiated stramineous to tan indusial flaps or recurved teeth, without paraphyses, inner indusia absent; spores bilateral, tuberculate to spinulose, perispore absent; x=29, 52.A
Forma de vida
TerrestreA
Distribución
México (país) Nativo y no endémicoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Hypolepis is a pantropical genus of about 45 species, with 15–20 in America. It is most closely allied to Paesia (x=26) and Pteridium (x=52). Counts of n=29 in H. nigrescens perhaps reflect an ancient link to a dysploid series from 26 to 29 and the doubling of 26 to make the more common n=52. The species with n=29 form a natural group (emarginate segments, recurved spines) and may deserve taxonomic segregation.
Hypolepis is distinguished by the surficial, long-creeping, hairy rhizome, discrete sori, and bilateral spores.
A
Hypolepis is distinguished by the surficial, long-creeping, hairy rhizome, discrete sori, and bilateral spores.
A