This study deals with the taxonomic treatment of the Sapindaceae Juss. on the coastal beach ridges of Pará. Methodology includes the analysis of botanical material from new collections and specimens of the Goeldi Museum (MG) and Agronomic Institute of the North (IAN) herberia, besides specialized literature. An identification key, descriptions, geographic distribution, comments and illustrations of species are provided. We described eight species, distributed in six genera: Cupania diphylla, Matayba discolor, M. guianensis, Paullinia pinnata, Serjania paucidentata, Talisia cerasina, T. veraluciana and Urvillea laevis. The species Urvillea laevis and Matayba discolor are new reports for the Brazilian Amazon. Serjania paucidentata is a new record for the state of Pará. The beach-ridge forest formation had the largest number of taxa.
Amazon; beach-ridge; Sapindaceae; taxonomy
