Asplenium gentryi A.R. Sm.
Descripción
Roots thin, wiry, not proliferous; rhizomes erect; rhizome scales bicolorous, central portion occluded, blackish, margins brown, clathrate or subclathrate, apices attenuate, 2–4 X 0.1–0.4 mm, entire; fronds clumped, mostly 7–25(–40) cm long; stipes black to atropurpureous, 1–10 cm X 1.5 mm, 1⁄10–1⁄3 of frond length, glabrous, with narrow brownish ridges 0.1 mm wide flanking the adaxial side; blades 1-pinnate, linear, 6–30 X 1.5–3 cm, apices pinnatifid, not proliferous; rachises black to atropurpureous, lustrous, glabrescent or with sparse, twisted, hair-like scales 1–2 mm long, adaxially with brownish wings 0.1–0.2 mm wide; pinnae quadrangular to oblong, 20–40 pairs, 7–15 X 2–6 mm, reduced proximally (lowest deltate, ca. 1⁄3–1⁄2 the length of the longest ones), sessile, dimidiate, basiscopic edges straight or curved upward, acroscopic edge slightly auriculate at the base, crenulate or subentire, sinuses to 0.8 mm deep; veins mostly simple, 1-forked at the acroscopic base of segments, tips evident adaxially; indument abaxially of scattered, appressed, whitish to tan, clavate hairs 0.1–0.2 mm long; sori up to 7 pairs per pinna, on both sides of costae; indusia mostly 2–3 X 0.5–0.6 mm, margins entire; spores reniform.A
Forma de vida
TerrestreA
Ejemplar revisado
Ags (de la Cerda L. 863, IEB). Chih (Correll & Gentry 22963, LL, 23032, MO, NY, UC, US; Fishbein 1807, 1817, ARIZ; Nesom & Vorobik 5603, 5726, TEX; Spellenberg et al. 8748, UC). Dgo (Ortega 5314, US; Reeder & Reeder 2477, US, 2494, MEXU, US; Sánchez 748a, US). Sin (Breedlove 18467, CAS, DS, NY; Correll & Correll 28851, LL, 28873, LL, MEXU; Gentry 7233, ARIZ, US; Gentry & Arguelles 18189, ARIZ; González O. 6028, MEXU; Ownbey & Ownbey 1942, 1943, US; Sanders 21121, UCR). Son (Fishbein 1724, ARIZ; Martin et al. s.n., ARIZ; Turner 74-375, ARIZ).A
Distribución
México (Country) endemicB
Elevación
1300–2600 mA
Ecología y Hábitat
In rocky canyons.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
Specimens of A. gentryi have been identified in herbaria as either A. monanthes or A. resiliens, from which it seems amply distinct by the characters given in the diagnosis. Apparently, this species grows with A. sanchezii. The two were collected at the same general locality and date by Sánchez, but A. gentryi is readily distinguished by having larger fronds and pinnae, more numerous pinna pairs, and blackish stipes and rachises.
Ab A. monanthes frondibus plerumque parvioribus, soris usque 7-jugatis utrinque costarum, rhachidibus atratis vel atropurpureis differt; ab A. resilienti hydathodis conspicuis adaxialiter, alis brunneolis rhachidum differt. (Honoring Howard Scott Gentry, 1903–1993, student of Agave, agricultural explorer for the U.S. Department of Agriculture, especially in the Sonoran Desert region, also affiliated with the Desert Botanical Garden in Phoenix.)A
Ab A. monanthes frondibus plerumque parvioribus, soris usque 7-jugatis utrinque costarum, rhachidibus atratis vel atropurpureis differt; ab A. resilienti hydathodis conspicuis adaxialiter, alis brunneolis rhachidum differt. (Honoring Howard Scott Gentry, 1903–1993, student of Agave, agricultural explorer for the U.S. Department of Agriculture, especially in the Sonoran Desert region, also affiliated with the Desert Botanical Garden in Phoenix.)A