Iboga, eboka, Bois Sacré, (Tabernanthe iboga), is a perennial rainforest shrub in the Apocynaceae (dogbane) family with psychedelic and dissociative properties native to western Central Africa. The Iboga tree is the central pillar of the Bwiti spiritual practice. The effects come primarily from the alkaloid ibogaine, and can last 24 hours or more.