164 VEGETABLE SUBSTANCES. 



Wake-Robin A>-um maculatum. 



Many roots, some the peculiar growth of America, 

 as well as the potato and mandioc, yield substantive 

 food to the inhabitants of both the northern and 

 southern divisions. Among these the SPANISH, or 

 SWEET POTATO Convolvulus batata is commonly 

 cultivated for its root in the tropical climates, both of 



