This study brings the inventory of the Leguminosae species which occur in an area of Ombrophilous Dense Forest from the north coast of the state of São Paulo, in altitudes that vary from the Restinga Forest, close to the sea level, to the vegetation at the top of the Cuscuzeiro Mountain, between 1,000 to 1,279 m of altitude. The floristic survey involved the collecting of herbs, subshrubs, shrubs, trees and lianas and was done going through ranges in the different phytophysiognomies. The Leguminosae family is well represented in the Ombrophilous Dense Forest of Picinguaba Nucleus (108 species), this reinforces the premise that their species play an important role in the composition and structure of this forest. Nineteen species are endemic ...