256 



BOTANY AND PHARMACOGNOSY. 



of plants belonging to the R^loracese is the sovirce of arrow poi- 

 sons. The URARi POISON of Brazil is obtained from Ficus atrox; 

 the iPOH ARROW POISON of Java and Borneo is derived from the 

 Upas-tree, Antiaris toxicaria. Many of the plants of the group 



Fig. 136. Hop vine (Humulus Lupulus) showing opposite, petiolate, entire or 

 3-lobed leaves, and the cone-like fruiting aments, which constitute "hops." 



contain emetic principles, as the Cocillana park of Guarea Rus- 

 byi, a tree of Bolivia. 



The milk-juice of quite a number of species of Ficus yields 

 India-rubber or caoutchouc (p. 667), as Ficus elastica of the East 

 Indies, F. toxicaria of South America, F. elliptica and F. pri- 



