 The ecoregion covers an area of along the Atlantic coast of eastern Maranhão, Piauí, and western Ceará states.The ecoregion includes the Lençóis Maranhenses National Park, where patches of restinga are interspersed with some of the most extensive coastal dunes in the world.The flora of the Northeastern Brazil restingas includes many species with affinities to the Amazon biome, which distinguishes them from the Atlantic Coast restingas of Brazil's eastern coast, whose flora is mostly derived from the Atlantic Forest of eastern Brazil.