Adiantum amplum C. Presl
Descripción
Rhizomes short-creeping, stout, 3–5 mm diam.; rhizome scales concolorous, bright golden brown, 6–10 X 0.8–1 mm, margins ciliate-denticulate; fronds clumped, 45–80(–130) cm long, arching; stipes atropurpureous, lustrous, 20–70 X 3–5 mm, 1⁄3–1⁄2 the frond length, glabrous except at bases, or with minute tubercles or raised areas; blades broadly ovate, 3–4-pinnate proximally; rachises atropurpureous, glabrous; pinnae 4–12 compound pairs, 15–35 X 10–20 cm, alternate, long-stalked; pinnulets mostly rhombic or obovate-flabellate, 7–15(–20) X 1–2.5 mm, bases broadly cuneate, sterile margins incised-lobate and denticulate, stalked 2–6 mm, color of stalks stopping abruptly at bases of pinnulets, articulate; veins free, forking, ending in minute teeth; indument absent on both sides of blades; idioblasts absent; sori to ca. 10 per pinnulet, confined to acroscopic and distal margins, with a little yellowish farina among sporangia; indusia 1–3 mm long, oblong to lunate, glabrous.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 23439, DS, NY). Col (González 16919, GUADA, UC). Gro (Palmer 518, NY, UC). Jal (Lott et al. 1012, MEXU, NY, UC). Mich (Hinton 15956, DS, ENCB, NY, P, UC, US). Nay (McVaugh 19220, IEB, MEXU). Oax (Mickel 5981, NY, UC). Sin (Breedlove 35623, CAS). Tab (Cowan 3163, NY). Ver (Tryon & Tryon 357, NY).A
Elevación
50 – 1500 mA
Ecología y Hábitat
In moist forests, often along streams, roadbanks and woods.A
Tipo de vegetación
Selva alta, Selva medianaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The rhomboid pinnulets and long, concolorous rhizome scales distinguish this taxon from the somewhat similar articulate species, A. tenerum. Adiantum amplum and A. tenerum seldom, if ever, grow together, the former occurring primarily on Pacific slopes, the latter on Atlantic slopes.
A
A