The açaí palm (Portuguese: [aˌsaˈi] ( listen), from Tupi-Guarani asaí; Euterpe oleracea) is a species of palm tree in the genus Euterpe cultivated for its fruit and superior hearts of palm. Its name comes from the Portuguese adaptation of the Tupian word ïwaca'i, '[fruit that] cries or expels water'. Global demand for the fruit has expanded rapidly in recent years, and açaí is now cultivated for that purpose primarily. Euterpe edulis (juçara) is a closely related species which is now the primary source of hearts of palm. 
Eight species are native to Central and South America, from Belize southward to Brazil and Peru, growing mainly in swamps and floodplains. Açaí palms are tall, slender palms growing upwards of 25+ meters (82 feet), with pinnate leaves up to 3 meters (9.8 feet) long.