Megalastrum pulverulentum (Poir.) A.R.Sm. & R.C.Moran
Descripción
Similar to Megalastrum subincisum except: plants with erect trunks to 0.7 m tall; fronds 2–5 m long; blades 4-pinnatepinnatifid at bases; indument abaxially on costae, costules, and ultimate segment midveins of soft, lax, hyaline hairs 0.8–1 mm long; costal scales with longer teeth ca. 0.1 mm; 2n=82 (Jam.).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 22622, 31677, 32364, 33687, DS, MEXU, NY). Pue (Ventura 399, ARIZ, ENCB, LL, NY; Ventura A. 13640, IEB, MEXU, XAL). Qro (Rzedowski 42866, IEB). Ver (Castillo C. et al. 2543, XAL; Palacios-Rios 3314, XAL; Sánchez S. 345, US).A
Elevación
(250 –)1200 – 2300 mA
Tipo de vegetación
Selva alta, Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This is the largest species in the genus, with the fronds as long as or longer than many tree ferns. Specimens of Ventura 399 have fronds to 4.6 m long. Smith et al. 4139 (US), from Edo. Puebla, was noted as having a trunk two feet tall, an unusual condition in the genus as a whole, but possibly normal for this species.A