Paullinia cupana, which is native The guarana tree produces red berries that have been used like coffee in its native Brazil for centuries. When ripe, the berries split open at the end and look similar to a human eyeball. A legend of the Satare-Maure Indians of Brazil tells that a beautiful woman named Onhiamuacabe gave birth to a child whose father was said to be a "mysterious being." The child was eventually put to death for eating some type of forbidden nuts.