Microgramma percussa (Cav.) de la Sota
Descripción
Rhizomes long-creeping, 1–2 mm diam.; rhizome scales brown, concolorous, 1–2 mm long, lanceolate, entire; fronds monomorphic or only slightly dimorphic, coriaceous; stipes stramineous, 1⁄10–1⁄3 the frond length, mostly 1–5 cm long; blades lanceolate, 12–22 X 0.8–2.2 cm, apices acute to long-acuminate, bases very gradually cuneate, midribs with scattered lanceolate scales 1–2 mm long, adaxially with the veins often readily visible; indument abaxially of sparse round scales 0.3 mm diam. and rare lanceolate scales 1 mm long, margins fimbriate, indument adaxially absent; sori round, slightly sunken, with dense filiform hairs (scales) branching from the bases into several reddish brown hair-like segments, nearly obscuring sporangia; 2n=74 (CR, Peru).A
Forma de vida
o en ocasiones epipétrica. EpífitaA
Ejemplar revisado
Chis (Breedlove 48254, 50869, 57861, CAS, ENCB). Oax (Hernández G. 445, MEXU, NY; Wendt et al. 3721, 4739, NY). Tab (Cowan 2967, CAS; Zamudio 1469, IEB). Ver (Wendt et al. 2634, 3999, CHAPA, NY).
A
A
Elevación
100 – 800(– 1200) mA
Tipo de vegetación
(H. Hernández G. 445) Bosque de encinoB
Categoría IUCN
No incluidaC
Categoría NOM-059-SEMARNAT-2010
No incluidaD
Discusión taxonómica
See discussion under generic description for comments on taxonomic position. Microgramma percussa is distinct by its sori with dense cushion of hair-like trichomes, small round abaxial blade scales, and coriaceous blades, usually with long-acuminate apices. The venation of M. percussa is often readily visible in dried fronds adaxially, contrasting with other scaly-bladed species of Microgramma.A