Polypodium hesperium Maxon
Descripción
Rhizomes creeping, 2–3 mm diam., occasionally whitish pruinose; rhizome scales concolorous, orange-tan, deltate-lanceolate, 2.5–3 X ca. 1 mm, entire to irregularly denticulate near apices; fronds 9–22 cm long, subapproximate; stipes 1⁄3–2⁄5 the frond length, stramineous, glabrous; blades pinnatisect, narrowly lanceolate, 2.2–4.5 cm wide; pinnae 5–10 pairs, 12–22 X 5–8 mm, oblong, rounded at apices, subcoriaceous; abaxial and adaxial blade surfaces glabrous; venation free but obscure, vein ends evident; sori round, medial; sporangia glabrous; 2n=148 (USA).A
Ejemplar revisado
BCN (Boyd 2714, UC; Brandegee s.n., 13 May 1893, UC, US; Moran 25612, UC; Moran & Thorne 14319, MICH, UC; Wiggins & Demaree 5000, UC, US). Chih (Correll & Gentry 23218, MSC, US).
A
A
Elevación
2100 – 2500 mA
Ecología y Hábitat
Crevices and cliffs on a variety of noncalcareous substrates, rarely on limestone.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species is distinct by its small size, short pinnae, and glabrous blades.A