Adiantum concinnum Humb. & Bonpl. ex Willd.
Descripción
Rhizomes short-creeping to suberect, compact, ca. 5 mm diam.; rhizome scales castaneous, concolorous, 3–4 X 0.8–1 mm, margins entire; fronds clumped, 20–75 (–95) cm long, arching to pendent; stipes castaneous to atropurpureous, lustrous, to 20 cm X 2(–3) mm, 1⁄4–1⁄3 the frond length, glabrous except at the bases; blades lanceolate to ovate-lanceolate, 2–3-pinnate proximally, 6–30 cm wide, long-attenuate at apices; rachises castaneous to atropurpureous, glabrous; pinnae 10–15(–18) compound pairs, gradually reduced to apices, alternate, basal acroscopic pinnule of each pinna often overlapping the rachises; pinnulets obovate to flabellate, cuneate at bases, sterile pinnulets entire to obscurely denticulate, 7–10 mm long, stalked 1–5 mm, lobed or incised distally, color passing into the pinnulet bases, non-articulate; veins free, forking, ending at entire thickened pinnulet margins or shallow sinuses; indument absent on both sides of blades; idioblasts absent; sori 4–8 per pinnulet, confined to distal margins; indusia 1–1.5 mm wide, reniform to round-reniform, glabrous; 2n=114 (Chis), 116 (Nay, Jam), 120 (PR).A
Forma de vida
TerrestreA
Ejemplar revisado
BCS (Brandegee 664, NY, UC, US). Chis (Breedlove 21551, DS, MO, NY). Col (Palmer 1127, MO, NY, UC, US). DF (Rzedowski 2055, ENCB). Dgo (Orcutt 3455, DS). Gro (Mexia 8724, NY, UC). Jal (Pringle 1866, DS, MO, UC, US). Méx (Matuda 27188, UC, US). Mich (Rzedowski 40741, ENCB, IEB). Mor (Lyonnet 2874, CAS, FCME, IEB, MO, UC). Nay (Mexia 534, MO, UC). Oax (Smith 2089, MO, UC, US). Pue (Turra 1979, ENCB). Qro (Rzedowski 42931, ENCB, IEB). SLP (Pringle 3394, UC). Sin (Breedlove 18049, CAS, NY). Son (Gentry 764, DS). Tam (Kemp s.n., Jan 1902, NY). Ver (Purpus 1964, UC). Unverified, Doubtful, or Mistaken Reports. Ags (reported by de la Cerda Lemus & Siqueiros D., 1985, but not verified).A
Elevación
50 – 2300 mA
Ecología y Hábitat
Terrestrial on moist banks in lightly shaded woods.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Estatus del taxón
(A) Como definida actualmente, probablemente una entidad natural (monofilética)A
Discusión taxonómica
This species is widespread and common nearly throughout Mexico, with over 500 collections seen. Among the 2–3-pinnate taxa that lack a conform terminal pinna, the short-stalked pinnules with stalk color passing into the pinnulets, veins ending at entire margins or shallow sinuses, and basal acroscopic pinnules overlapping the rachises distinguish this species.A