Asplenium dalhousieae Hook.
Descripción
Roots thin, wiry, fibrous, not proliferous; rhizomes erect; rhizome scales black with brown margins, clathrate, 2–5 X 0.6–1 mm, sparingly denticulate; fronds mostly 10–20 cm long; stipes dark to light brown throughout, dull, nearly absent to 1(–3) cm X 1 mm, 1⁄10–1⁄15 length of fronds, or less, scaly throughout, not winged; blades subcoriaceous, elliptic, pinnatifid, lobed to within 1–2 mm of blade midribs, ca. 4–15(–20) X 1.5–6 cm, gradually tapered proximally, apices obtuse, not rooting; rachises light brown to tan, dull, not winged, with numerous, brownish, strongly clathrate scales 0.5–2 mm, these linear, uniseriate at tips, to ca. 6 cells wide and lanceolate; pinnae confluent with adjacent pinnae, deltate, 8–20 pairs, to 3 X 1.5 cm, widest at the bases, rounded at tips, margins entire to crenulate; veins obscure, 2–3-forked, sometimes casually anastomosing near margins, tips not evident adaxially; indument abaxially of whitish to tan, appressed clavate hairs 0.1–0.2 mm long; sori 3–8 pairs per pinna, on both basiscopic and acroscopic sides of pinnae; indusia whitish, mostly 3–10 X 0.5–0.6 mm, margins entire; spores reniform, 64 per sporangium; 2n=72 (India).A
Forma de vida
TerrestreA
Ejemplar revisado
Chih (Bye 1772, COLO not seen, UCR). Sin (Breedlove 16464, CAS, NY, 16904, CAS, 18370, CAS, MO; Gentry 6503, ARIZ, MICH, MO, US). Son (Fishbein 1042, ARIZ; Phillips 547, ARIZ; Steinmann 1317, NY; Toolin 306, ARIZ).
A
A
Elevación
1050–2000 mA
Ecología y Hábitat
At bases of rocks, slopes, rocky ravines.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This species is highly distinctive and not closely related to any other in Mexico. It is the only Mexican species of Asplenium with deeply pinnatifid blades. Its affinities appear to be with Old World species. It is a member of the segregate genus Ceterach, and differs from congeners in Mexico by having shallowly pinnatifid blades. Most of the collections seen are from the Sierra Surutato, Edo. Sinaloa.A