Asplenium sanchezii A.R. Sm.
Descripción
Ab A. castaneo pinnis paucioribus 6–15-jugis, frondibus parvioribus, apicibusque marginibus acroscopicis pinnarum perspicue crenulatis, segmento apicali laminarum distinctiore differt; ab A. blepharode et A. fibrilloso indusiis integris differt. (Honoring José Sánchez S., collector of plants in Mexico.)
Roots thin, wiry, fibrous, not proliferous; rhizomes suberect to erect; rhizome scales dark brown to black, clathrate, ca. 3 X 0.3–0.4 mm, entire; fronds clumped, 10–12 cm long; stipes castaneous, lustrous, 1–2.5(–6) cm X 0.5–1 mm, 1⁄10–1⁄2 of frond length, sparsely scaly, adaxially not winged or wings brown, less than 0.1 mm wide; blades chartaceous, 3–10 X 1–2 cm, 1-pinnate, linear, ending in rather large triangular or hastate terminal segments 5–10 X 4–10 mm, not proliferous; rachises castaneous to atropurpureous, lustrous, with a few hair-like scales to 1 mm, adaxial wings 0.1 mm wide or less; pinnae oblong, 6–15 pairs, the proximal ones slightly deflexed, 4–6(–10) X 2–4(–7) mm, subsessile, rachis color not running onto the pinna stalks, bases not or slightly auriculate, apices obtuse, acroscopic margins crenulate; veins mostly 1-forked, obscure, tips evident adaxially; indument abaxially of scattered, appressed, tan, clavate hairs 0.1 mm long; sori 2–4 pairs per pinna, on both sides of midveins; indusia whitish to brown, 1–2 X 0.7–0.9 mm, margins entire; spores very large, reniform.
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Roots thin, wiry, fibrous, not proliferous; rhizomes suberect to erect; rhizome scales dark brown to black, clathrate, ca. 3 X 0.3–0.4 mm, entire; fronds clumped, 10–12 cm long; stipes castaneous, lustrous, 1–2.5(–6) cm X 0.5–1 mm, 1⁄10–1⁄2 of frond length, sparsely scaly, adaxially not winged or wings brown, less than 0.1 mm wide; blades chartaceous, 3–10 X 1–2 cm, 1-pinnate, linear, ending in rather large triangular or hastate terminal segments 5–10 X 4–10 mm, not proliferous; rachises castaneous to atropurpureous, lustrous, with a few hair-like scales to 1 mm, adaxial wings 0.1 mm wide or less; pinnae oblong, 6–15 pairs, the proximal ones slightly deflexed, 4–6(–10) X 2–4(–7) mm, subsessile, rachis color not running onto the pinna stalks, bases not or slightly auriculate, apices obtuse, acroscopic margins crenulate; veins mostly 1-forked, obscure, tips evident adaxially; indument abaxially of scattered, appressed, tan, clavate hairs 0.1 mm long; sori 2–4 pairs per pinna, on both sides of midveins; indusia whitish to brown, 1–2 X 0.7–0.9 mm, margins entire; spores very large, reniform.
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Forma de vida
Terrestre or epipetricA
Ejemplar revisado
Chih (Correll & Gentry 23030, LL). Dgo (Oliver et al. 797, MO; Reeder & Reeder 2493, US). Oax (Frame 312, NY, UC). Sin (Breedlove 35730, CAS, MO; Ownbey & Ownbey 1947, US).
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Distribución
México (Country) endemicB
Elevación
1800–2500 mA
Ecología y Hábitat
On rocks and walls of moist cliffs.A
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
This delicate new hydathodous spleenwort may be most closely related to A. castaneum, from which it differs in the generally fewer pinna pairs and smaller fronds, more decidedly crenulate pinna apices and acroscopic margins, and in the larger, often hastate segments at the blade tips. Asplenium sanchezii differs from A. blepharodes and A. fibrillosum in having entire indusia. From A. gentryi and A. hallbergii, A. sanchezii differs in having smaller fronds and fewer pinnae, 6–15 pairs. From A. soleirolioides and A. stolonipes it differs in the nonproliferous blades. From A. pringlei, it differs in having the sori not on pinna lobes. From A. oligosorum and A. olivaceum it differs in the sori located on both sides of the midveins, usually 2–4 pairs per pinna. Specimens in herbaria have previously been determined as A. castaneum, A. monanthes, or A. pringlei. The sole collection from Chihuahua was cited by Knobloch and Correll (1962: 156) as A. castaneum. The apparent disjunct distribution in Mexico can be expected to be filled by additional collections.
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