Strychnos icaja

Strychnos icaja is a very large tropical rainforest liana of the family Loganiaceae, native to West Tropical Africa, which may reach 100 metres in length. Vernacular names include mbondo in the Bantu language Lissongo, kpwili in Mbwaka, and mbondo or boundou in other Bantu languages of Gabon and the Democratic Republic of Congo. Wikipedia says the plant has been used in divination and to prepare ordeal poisons and arrow poisons, and that throughout Central Africa a root or root-bark infusion, more rarely a stem-bark extract, has been used as an ordeal poison. The article quotes a missionary account in which a candidate for initiation into the Bwiti secret society of Gabon drinks a decoction of the bark, and calls this appearing to be entheogenic use. The main active principles are strychnine and pseudostrychnine.