Aspidotis (Nutt. ex Hook. & Baker) Copel.
Descripción
Terrestrial or epipetric; rhizomes compact, ascending, branched; rhizome scales linear-lanceolate, mostly concolorous dark brown, margins entire, often narrow, pale; fronds 8–35 cm long, monomorphic to slightly dimorphic, clumped; stipes usually dark reddish brown, grooved adaxially, glabrous; blades deltate or pentagonal, 3–5-pinnate, thick to thin, abaxially glabrous, adaxially lustrous, glabrous; ultimate segments short-stalked or with base narrowed and decurrent onto costae or costules, linear to lanceolate, acuminate, mostly 0.5–1.3 mm wide; veins of ultimate segments obscure, free, unbranched; sori marginal; indusia scarious, whitish, broad, round, discontinuous (in ours) or continuous; sporangia 64-spored, lacking paraphyses and glands; spores dark brown, reticulate; x=30.A
Forma de vida
TerrestreA
Distribución
México (Country) native and not endemicB
Ecología y Hábitat
They occur at bases of boulders or in rock crevices, in dry to moist, montane areas, woodlands, or chaparral, sometimes on ultramafic rocks.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Aspidotis is a genus of four species, two of them in Mexico. Lellinger (1968) recognized Aspidotis as separate from Cheilanthes based on its elongate, distantly dentate segments with striate lustrous surfaces and broad, scarious indusia. Molecular data (Gastony & Rollo, 1995) show that Aspidotis is sister to Aleuritopteris (e.g., Cheilanthes farinosa) and Sinopteris (e.g., Cheilanthes albofusca Baker, of China).A