Dipteryx odorata is a species of flowering tree in the pea family, Fabaceae. The tree is native to Central America and northern South America and is semi-deciduous. Its seeds are known as tonka beans . They are black and wrinkled and have a smooth, brown interior. They have a strong fragrance similar to sweet woodruff due to their high content of coumarin.
The word tonka is taken from the Galibi (Carib) tongue spoken by natives of French Guiana; it also appears in Tupi, another language of the same region, as the name of the tree. The old genus name, Coumarouna, was formed from another Tupi name for tree, kumarú.
Many anticoagulant prescription drugs, such as warfarin, are based on 4-hydroxycoumarin, a chemical derivative of coumarin initially isolated from this bean. Coumarin, however, does not have anticoagulant properties.