Castanheira-do-Pará (Bertholletia excelsus) also known as Amendoeira-da-américa, Castanha, Castanha-do-brasil, Castanha-do-maranhão,  Castanha-mansa, Castanha-verdadeira, Castanheira, Castanheira-do-maranhão, Castanheira-rosa, Castanheiro, Castanheiro-do-pará, Noz-do-brasil, Tucari.

It occurs as scattered trees in large forests on the banks of the Amazon, Rio Negro and the Orinoco. It is a large tree, reaching 30 to 45 metres tall and up to 2 metres diameter, among the largest of trees in the Amazon Rainforests.

It may live for 500 years or more, and according to some authorities often reaches an age of 1,000 years. The wood has good weathering characteristics and has high resistance to decay and it is a popular choice for ship decking, water tanks, railroad ties, and other exterior uses. Used in boat building (general), decking, canoes, chairs, decorative veneer.

castanha do paráThe fruit is the Castanha-do-Pará. The saturated content is among the highest of all nuts, surpassing macadamia nuts, which are primarily mono unsaturated fat, and the nuts are pressed for their oil.