Sloanea berteroana

Sloanea berteroana is a tree of the Caribbean region. The name is often misspelled as Sloanea berteriana. Its vernacular names include montillo and bullwood. It is native to Puerto Rico. This tree is common in the Toro Negro State Forest.

Uses

The Pirahã, a Brazilian tribe, rub them on their eyelids to stay awake. This probably works because of some kind of alkaloid in the bark of the plant. They know that danger is everywhere around them in the jungle and that a deep sleep can make one defenseless.