The genus Moranopteris (honoring NYBG Fern Curator, Robbin C. Moran), widespread in the Neotropics, was recently segregated from among the Grammitid ferns (Polypodiaceae). Monograph of Moranopteris (Polypodiaceae) treats 28 species and 1 hybrid, with a key to taxa, as well as full descriptions, discussions, exsiccatae, and illustrations.