Abstract
Meniscium Schreber (Thelypteridaceae) is a tropical American fern genus containing 25 species, distributed from Florida, the Antilles and southern Mexico to northern Argentina and Paraguay. This genus is characterized by 1–pinnate lamina (rarely simple) with entire, undulate, crenulate or serrate pinnae, conform or subconform apical pinnae, veins regularly anastomosing, indument, when present, with simple or glandular hairs, and indusia absent. We present a taxonomic revision of the genus including a key to species, descriptions, a list of specimens examined, geographical distribution, as well as comments and illustrations. Five names are relegated to synonymy (i.e. Meniscium ensiforme (C. Chr.) Pichi Sermolli, Meniscium affin e Presl ex Ettingshausen, Meniscium salzmannii Fée, Dryopteris standleyi Maxon & Morton, Dryopteris chrysodioides (Fée) Maxon & Morton var. goyazensis Maxon & Morton), one neotype is designated for M. chrysodioides Fée, one epitype for Polypodium reticulatum Linnaeus and 17 lectotypes are designated.