Adiantum galeottianum Hook.
Descripción
Rhizomes short-creeping, compact, ca. 2–4 mm diam.; rhizome scales golden brown, 2–3 X 0.1–0.3 mm, margins ciliolate; fronds clumped, 17–35 cm long, arching; stipes castaneous (to atropurpureous), sublustrous, ca. 10 cm X 1 mm, 1⁄3–1⁄2 the frond length, glabrous or with minute stubble toward the bases; blades usually linear, 1-pinnate, sometimes 2-pinnate (and hence more broadly deltate) with a single proximal pair of divided pinnae; rachises castaneous to atropurpureous, glabrous, sometimes glaucous; pinnae 3–10 pairs, opposite to subopposite, sessile or shortstalked ca. 1–1.5 mm; ultimate divisions (pinnae) suborbicular, subcordate to rounded at bases, apices rounded, sterile margins irregularly crenate or subentire, short-stalked 1–2 mm, stalk color stopping near the pinna bases, non-articulate; veins free, forking, ending at the whitish cartilaginous pinna margins; indument absent on both sides of blades; idioblasts absent; sori to ca. 15 per pinna, on all but the proximal margins; indusia ca. 2 mm long, reniform or round-reniform with often deep sinuses, glabrous.
A
A
Forma de vida
TerrestreA
Ejemplar revisado
Gro (Clark 7201, MO; Gray & Rowell 3004, US; Hinton et al. 11375, ENCB, K, MEXU, MO, NY, US; Téllez 6168, MEXU; Velázquez 661, FCME). Oax (Cedillo T. & Torres 1471, CAS, MEXU; Conzatti 4374, MEXU, US; Hallberg 1765, NY; Mickel 3992, 7004, NY, UC).A
Distribución
México (país) EndémicoA
Elevación
600 – 900 mA
Ecología y Hábitat
On wet roadside banks, moist banks of streams.A
Tipo de vegetación
Bosque de pino, Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Adiantum galeottianum is one of the most distinctive species in the genus with its nearly orbicular pinnae and thickened pinna margins. It is most closely related to A. shepherdii, with which it agrees in the thickened pinna margins; Adiantum shepherdii differs by the much more numerous, dimidiate ultimate divisions (pinnae). Another relative is A. patens, which differs in having imparipedate blade form.A