Iboga

Iboga is used in a way that has almost no parallel among sacred plants. Where most traditions take a plant repeatedly and in moderate amounts, Bwiti takes it once, in an overwhelming dose, over an initiation lasting several days, and many initiates never take a comparable amount again.

Bwiti is an initiatory religion of Gabon, strongest among the Fang, the Mitsogo and the Apindji, organised around a temple, a harp, drums and long night ceremonies. The initiate is prepared, then given quantities of scraped root bark over many hours under close supervision, since the dose is genuinely dangerous and deaths have occurred. What follows is understood as a journey: the initiate crosses to the land of the dead, meets the ancestors, and is shown the origins of things. On returning they are a member, and they have seen for themselves rather than been told.

The structure is a rite of passage in the strict sense, with separation, ordeal and return, and the plant is the ordeal. Subsequent participation is about music, dance and communion with the ancestors, and uses far smaller amounts.

Bwiti took on Christian vocabulary and imagery during the colonial period, and different branches sit at different distances from Christianity, but the ancestor cult beneath is continuous and was not replaced.

Iboga has an unusual second life. In 1962 an American with a heroin dependency took ibogaine, the principal alkaloid, and reported that his withdrawal symptoms vanished and his craving with them. The observation has been repeated many times since in unregulated clinics around the world, and interrupting opioid dependence with a single dose is now iboga's best known property outside Gabon.

The claim is taken seriously and remains poorly evidenced. Ibogaine is cardiotoxic, it prolongs the QT interval, and deaths have occurred in clinics operating without medical screening or monitoring. Rigorous trials have been slow, partly because the compound is a controlled substance in many jurisdictions and partly because a treatment given once does not fit the commercial model that funds drug development.

Two consequences run back to the plant. Tabernanthe iboga is slow growing and confined to a limited range in Central Africa, and demand from outside has driven overharvesting of wild stands; Gabon has restricted export in response and declared iboga a national treasure. And the Bwiti have watched a sacrament, whose meaning is initiation into a community of ancestors, reclassified elsewhere as a pharmaceutical for a condition, with no return to the people who kept it.

The atlas records the medical claim as reported and unsettled, and the conservation and consent problems as established.