Oenocarpus is a genus of pinnate-leaved palms belonging to the family Arecaceae (order Arecales). It comprises nine accepted species and one natural hybrid, all native to the Neotropics — ranging from Costa Rica and Trinidad in the north through Venezuela, Colombia, the Guianas, Ecuador, and Peru, to Brazil and Bolivia in the south.
The palms of this genus are characterized by their feather-like (pinnate) leaves and clustered, often abundant fruit. In their native range they are commonly known as bacaba in Brazil and palma milpesos (or simply milpesos) in Spanish-speaking countries, names that are most closely associated with the well-known species Oenocarpus bacaba.
The fruits of Oenocarpus are an important food resource both for wildlife and local human communities. The green aracari (Pteroglossus viridis), for example, depends heavily on the fruit of O. bacaba. Humans throughout Amazonia and the Orinoco basin have long harvested the fruits for fresh consumption and to extract a high-quality edible oil. This oil was notably used as a substitute for olive oil during World War II. Beyond food, Oenocarpus palms contribute to local livelihoods through folk medicine practices and the use of their hard, durable wood in handicrafts.
Notable members include O. bataua, one of the most widespread species ranging from Panama to Bolivia, valued for its nutritious "patauá" oil; O. bacaba, the most culturally prominent species across Amazonia; and O. mapora, which has one of the broadest distributions in the genus, extending from Costa Rica to Bolivia.
Distribution
Oenocarpus is distributed across the Neotropics, from Costa Rica and Trinidad in the north to Brazil and Bolivia in the south, with the greatest species diversity in Amazonia. Individual species ranges span Venezuela, Colombia, Ecuador, Peru, the Guianas, and Panama.
Ecology
The fruits of Oenocarpus palms are an important food source for Neotropical wildlife, including birds such as the green aracari (Pteroglossus viridis), which relies heavily on O. bacaba fruit. The genus occupies lowland tropical rainforest and várzea habitats across its range.
Cultural Uses
Oenocarpus palms have multiple traditional uses across Amazonia and the Orinoco basin. The fruits are eaten fresh and pressed to yield a high-quality edible oil historically used as an olive oil substitute during World War II. The palms are also employed in folk medicine, and their hard wood is used in local handicrafts.
