Monoecious palms; leaves pinnate with heavy, ligulate leaf-sheaths tubular but split at the ventral side, more or less fibrous at margin. Inflorescences infrafoliar with a stout, erect axis and long, slender, drooping rachillas. This genus with a limited number of species is mainly known from the Amazon basin and adjacent regions from sea level up to about 1200 m altitude. One species occurs in Panama. Three species are frequently observed on the lower mountain-slopes of the Guayana Highland.