Notholaena aschenborniana Klotzsch
Descripción
Rhizomes compact, horizontal, 2–3 mm diam.; rhizome scales linear-lanceolate, ca. 3 mm long, black, concolorous, sclerotic, lustrous, margins ciliate-denticulate; fronds 21–28 X 2–6 cm, clumped; stipes ca. 1⁄4 the frond length, black, terete, with scattered, dark brown, linear-lanceolate, ciliate-denticulate scales 3 mm long (these especially abundant near the base of the stipe), and brown to whitish highly dissected scales (resembling stellate hairs); blades narrowly lanceolate, bipinnate to bipinnatepinnatifid, not strongly narrowed proximally; pinnae 12–20 pairs, equilateral, the segments oblong, obtuse; adaxial surfaces with dense, stellate, white hairs; abaxial surfaces with a slight farina covering, densely clothed with brown, linear-lanceolate, long-ciliate scales 0.5–1 mm long, and pale cilia covering the surfaces and sori; blade margins somewhat curved; sporangia 32-spored; spores orange-tan; n=2n=90, apogamous (NL, SLP, Tam, USA).A
Ejemplar revisado
Ags (McVaugh 16682, NY). Chih (Pringle 469, US). Coah (Hinton 16561, NY). Dgo (Sánchez 737, MEXU). Hgo (Edwards 892, US). Mor (Pacheco 3439, UAMIZ). NL (Aguirre s.n., 6 Dec 1976, NY). Oax (Lorence 3359, MEXU). Pue (Chiang et al. 2103, MEXU). Qro (Díaz B. 3774, IEB). SLP (Purpus 5486, GH). Son (White 533, MICH). Tam (Stanford et al. 1983, NY). Zac (Johnston et al. 10468a, MEXU).A
Elevación
900 – 3000 mA
Ecología y Hábitat
In rocky slopes and cliffs, mostly on limestone, less commonly on basalt.A
Tipo de vegetación
Bosque de encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Notholaena aschenborniana is sometimes described as nonfarinose, but the abaxial glandular farina characteristic of all species of Notholaena is present beneath the dense covering of scales. Windham (in FNA Ed. Comm., 1993) reported this species to comprise mostly apogamous triploids that apparently arose through autopolyploidy; it is possible that 64-spored, diploid populations of N. aschenborniana may exist.
This species is similar to N. galeottii but is distinct in the stellate hairs on the adaxial blade surfaces.
A
This species is similar to N. galeottii but is distinct in the stellate hairs on the adaxial blade surfaces.
A