Melpomene leptostoma (Fée) A.R.Sm. & R.C.Moran
Descripción
Rhizomes short-creeping to suberect, compact, 1–2 mm diam.; rhizome scales blackish, 2–4 mm long, appressed, acute at tips; fronds tightly clumped; stipes dark brown to black, 1–4 cm long, ca. 1⁄6–1⁄20 the frond length, with stiff reddish setae 0.3–0.8 mm long and scattered, branched hairs 0.3 mm long; blades 11–20(–35) X 1.3–1.7 cm, narrowly elliptic, very gradually tapering at both ends; rachises with stiff setae 0.3–1 mm long on both sides; pinnae to ca. 120 pairs, linear, 6–11 mm long, to 6 times longer than wide, decidedly ascending, slightly decurrent at bases, acute at tips; costae brown to black abaxially, but color not visible at pinna bases; indument absent except for occasional hairs 0.1–0.3 mm long on costae and pinna margins; sori mostly 4–6 pairs per pinna, lacking setae among the sporangia.A
Forma de vida
EpífitaA
Ejemplar revisado
Chis (Hardison 92A, UC). Hgo (Nava P. s.n., FCME). Oax (Cedillo T. 919, MO; Mickel 5737, ENCB, NY, UC). Pue (Ramos & Fernández R-123, CHAPA, NY; Ventura A. 8655, ENCB, LL). Ver (Lyonnet 550500011, MEXU; Müller 32, NY).
Unverified, Doubtful, or Mistaken Reports. Gro (Lorea 1990, 4007, 4558b, cited by Lorea-Hernández & Velázquez M., 1998, but not verified). Méx (reported by Mickel & Beitel, 1988, but not verified; Tejero-Díez 2377, IZTA, cited by Tejero-Díez & Arreguín-Sánchez, 2004, but the specimen, although juvenile and sterile, is most likely M. pilosissima, and not M. leptostoma).A
Unverified, Doubtful, or Mistaken Reports. Gro (Lorea 1990, 4007, 4558b, cited by Lorea-Hernández & Velázquez M., 1998, but not verified). Méx (reported by Mickel & Beitel, 1988, but not verified; Tejero-Díez 2377, IZTA, cited by Tejero-Díez & Arreguín-Sánchez, 2004, but the specimen, although juvenile and sterile, is most likely M. pilosissima, and not M. leptostoma).A
Elevación
1000 – 2050(– 2700) mA
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The glabrous pinna margins, blade surfaces, and sori of M. leptostoma, as well as the thinner-textured, more ascending segments and blackish costae abaxially, readily separate it from M. xiphopteroides. From M. pilosissima, which has similarly ascending segments, M. leptostoma is easily distinguished by its glabrous blades. See additional discussion under M. xiphopteroides.A