1901; Hoffer and Osmund 1967; Pope 1969; Schneider and Sigg 
1957). 
XV 
Tabernanthe is a genus of about seven species native to 
tropical Africa. 
Sometimes other plants — occasionally as many as 1(—are 
taken with iboga, but few have been botanically identified or 
chemically investigated. One of the most interesting, the euphor- 
biaceous Alchornea floribunda Muell.-Arg., is employed in the 
same way as iboga in another secret society in Gabon, but it may 
not be hallucinogenic. Its active principle has been thought to be 
the indole yohimbine (Fernandez 1972; Schultes 1970c), an 
unusual taxonomic occurrence for this base; recently, alchor- 
neine, isoalchorneine and alchorneinone have been reported 
from this species (Khuong-Huu, Le Forestier and Goutarel 
1972) 
4. ISOXAZOLES 
Agaricaceae 
Amanita L. 
Amanita muscaria (L. ex Fr.) Pers. ex W.J. Hook.—the fly 
agaric, a mushroom of the north-temperate zone of Eurasia and 
153 
