L., Sp. P1.1079.1753 Epiphyte, to 70 cm tall; rhizome densely scaly, the scales reddish-brown, threadlike. Leaves simple; petioles to 3 cm long, canaliculate; blades oblanceolate, acute at apex, tapered at base, to 70 cm long and 9 cm wide, glabrous except for scales on lower midrib, the scales +/- lanceolate, peltate, brown, the midrib raised above, the veins mostly free or branched once. Sori many, linear along distal edge of lateral veins oblique to midrib, of irregular lengths, mostly in midsection of leaf; indusium slender, thin. Croat 9443. Easily distinguished by its simple blade with slender, oblique sori and by its epiphytic habit. Mexico to Bolivia; the Antilles. In Panama, known from tropical moist forest in the Canal Zone, Bocas del Toro, Panama, and Darien, from premontane wet forest in Colón and Panama, and from tropical wet forest in Colón, San Blas, Coclé, and Panama.