SWIM just found this article describing the identification of bufotenine in the red latex sap of the tree Brosimum acutifolium. According to the article, the red latex of this tree is called takini and is used in shamanic practices in the tropical americas.
The authors report that 100ml of this red latex sap contain 2.5mg bufotenine.
The authors report that 100ml of this red latex sap contain 2.5mg bufotenine.