Megalastrum lunense (Christ) A.R.Sm. & R.C.Moran
Descripción
Rhizomes short-creeping to suberect, plants appearing acaulescent; stipes stramineous to light brown, 30–65 cm X 4–6 mm, 1⁄3–1⁄2 the frond length, persistently scaly in distal part; stipe base scales dense, brown, spreading to appressed, broadly ovatelanceolate, mostly 5–15 X 1.5–4 mm, ± entire and lacking definite teeth, the cells isodiametric; blades deltate, 50–100+ cm long, 3-pinnate-pinnatifid or nearly 4-pinnate at bases, proximal pinna pair (14–)23–34 X 7–20 cm, much more strongly developed basiscopically (basal basiscopic pinnule to 15 X 6 cm) than acroscopically; middle pinnae 2-pinnate-pinnatifid, sessile to stalked to 1 cm; indument abaxially on rachises, costae, and costules of numerous brown, lustrous, ovate-lanceolate, entire scales, also with rather dense, hyaline, acicular septate hairs mostly 0.5–1.5(–2) mm long, veins with similar hairs, also often with shorter, erect, gland-tipped hairs to 0.4 mm on tissue between veins; indument adaxially of stout, curved acicular septate hairs ca. 1 mm long on costae, costules, and veins, sometimes with a few shorter hairs between veins; sori medial, exindusiate.A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 42014, DS, MEXU, 56669, CAS, ENCB, NY).A
Elevación
800 – 1000 mA
Tipo de vegetación
Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species can easily be distinguished from congeners in Mexico by the broadly ovate-lanceolate (vs. linear-lanceolate), entire or faintly toothed (vs. distinctly toothed) scales of the stipe bases, rachises, and costae.A