CLASSIFICATION OF ANGIOSPERMS. 603 



Paullinia Cupana, which furnishes the official Guarana, should 

 belong to this group. 



The fruit shells of Nephelium lappaceum contain a toxic sapo- 

 nin (Ph. Weekblad., 45, i, 156, 1908). Four or five per cent. 



FIG. 332. Flowering and fruiting branch of Brazilian cocoa (Paullinia Cupana) yielding 

 the Guarana used in medicine. After Radlkofer. 



of SAPONIN is found in the fruit of Sapindus trifoliatus of India. 

 A principle related to saponin is found in Sapindus Saponaria of 

 tropical America. Saponin is also found in the fruits of other 

 species of Sapindus, the bark of Pometia pinnata of the Sunda 



