Melpomene deltata (Mickel & Beitel) A.R.Sm. & R.C.Moran
Descripción
Rhizomes creeping, 1–1.5 mm diam.; rhizome scales blackish to dark red-brown, 2–3 mm long, appressed, acute at tips; fronds clumped; stipes brown to black, 1.5–4 cm long, ca. 1⁄6 the frond length, glabrous except for scattered branched hairs 0.3 mm long; blades linear-elliptic, 13–16 X 0.9–1.2 cm, gradually tapering at both ends; rachises glabrous on both sides, or with rare transparent acicular hairs 0.1 mm long; pinnae mostly 20–30 pairs, obliquely deltate, 6–7 mm long, 1–2.5 times longer than wide, ascending, basiscopic side ca. 40–50° to the rachis, decurrent, acroscopic side 70–90°, rounded at tips; costae visible and blackish abaxially; indument absent abaxially and along pinna margins, or nearly so; sori 4–6 pairs per pinna, lacking setae among sporangia.A
Forma de vida
u ocasionalmente epipétrica. EpífitaA
Ejemplar revisado
Chis (Breedlove 40337A, DS; Heath & Long 299, CAS; Mickel 1247d, NY). Oax (Breedlove 65943A, CAS; Mickel 4894, NY, UC).
A
A
Elevación
2400 – 3000 mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Melpomene deltata is close to M. moniliformis and M. flabelliformis and grows with them, but differs in its glabrous nature (no setae in sori or on rachis) and segment shape (obliquely deltate, not narrowly oblong). Melpomene moniliformis is also nearly glabrous, but it is more often terrestrial, has short, rounded (not deltate) segments 2–4 mm long, perpendicular to the rachis, and sometimes has sparse soral setae. Melpomene deltata is similar to M. melanosticta in its lack of hairs, but its segments are more ascending and deltate. In Chiapas, M. deltata (Mickel 1247d; Breedlove 40337A) has been collected with M. moniliformis (Mickel 1247a, NY; Breedlove 40337B), M. zempoaltepetlensis (Mickel 1247b), and M. flabelliformis (Mickel 1247c). In Oaxaca, M. deltata (Breedlove 65943A) grows with M. moniliformis (Breedlove 65943B).A