Anadenanthera colubrina (Yopo, Cebil), a rare species that has been held as entheogenic for many centuries. Archaeological remains of Anadenanthera colubrina have been found all throuhout South America and the West Indies. Black beans from Anadenanthera colubrina trees were toasted, pulverized and mixed with ashes or calcined shells to make psychedelic snuff called yopo by Indians in Orinoco basin in Colombia, Venezuela and possibly in southern part of the Brazilian Amazon. Very few people know about Yopo in “modern” cultures, but they were and are a common part of culture with the indigenous South Americans and Mexicans. It is estimated as much as 20% of the Maya were regular Yopo users.