Notholaena aliena Maxon
Descripción
Rhizomes compact, horizontal, 1–2 mm diam.; rhizome scales linear, attenuate at apices, concolorous, dark brown to black, sclerotic, to weakly bicolorous, margins with weak pale hairs, 1.5–2.5 mm long; fronds 14–22 X 1–1.5 cm, clumped; stipes ca. 1⁄3 the frond length, terete (rachises grooved), castaneous, with scattered scales like those of rhizomes, lax pale hairs to 1 mm long, and minute glandular hairs; blades linear-oblong, pinnatepinnatifid; pinnae 8–12 pairs, pinna lobes 4–5 pairs; adaxial blade surfaces minutely farinose and sparsely villous with lax hairs; abaxial blade surfaces densely pale yellow-farinose, with scattered to dense orange-tan linear scales and hairs 1–1.5 mm long; blade margins slightly curved; sporangia 16-spored; spores tan to black.A
Forma de vida
Epipétrica.A
Ejemplar revisado
Chih (Burgess 5216, ARIZ; Pringle 463, GH p.p.; Reeves R57232, ASC). Coah (only the type collection). Tam (Bartlett 10999, MICH, US).A
Elevación
700 – 1200 mA
Ecología y Hábitat
Rocky slopes and cliffs and ledges, usually on igneous rocks.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Notholaena aliena is closely related to N. grayi but is readily distinguished in having the adaxial surfaces of the blades distinctly villous with sparse, lax, whitish, tortuous hairs. Notholaena grayi is only sparsely farinose on the adaxial blade surfaces and is devoid of hairs. Notholaena aliena differs from the closely allied N. weatherbiana by the latter having darker brown stipes, scales and hairs on the stipes, inconspicuous glands on the adaxial surfaces of the pinnules, and finely white-villous blades on both sides.A