Passiflora cacao Bernacci & M. M. Souza is described. The Passifloraceae has a limited known distribution area in southern Bahia, Brazil. This new species is not very abundant and occurs in a mountainous area associated with dense ombrophilous forest noteworthy for its great biodiversity, including many species of hummingbirds. Passiflora cacao is similar to P. edulis Sims, but it can easily be recognized by the cylindrical hypanthium and winged seeds. In addition, the flowers are usually smaller, with inner corona and outer corona series greater in number.