Toxicological trivia from February 26, 2014: : The Couroupita guianensis is a deciduous tree in the family Lecythidaceae. It is native to the rainforests of Central and South America. It is cultivated in many other places. This tree is planted as an ornamental for its showy, scented flowers, and as a botanical specimen for its interesting fruit. The fruit is fed to livestock such as pigs and domestic fowl.The fruit is edible, but not usually eaten by people because it can have an unpleasant smell. The tree is also called: a)  Kanonskogelboom (Dutch); b) cannonball tree (English); c) Both previous terms are correct.

Correct answer is c. Read more in  wikipedia.