24 LEAVES 



vated in large quantities. The leaves are picked twice in the year, 

 or sometimes oftener, and dried. Only a very small proportion of 

 the coca produced is exported ; by far the greater part is consumed 

 by the natives, whilst a considerable quantity is used in Callao for 

 the manufacture of cocaine, the crude alkaloid being exported instead 

 of the leaves. 



A B 



FIG. 14. Bolivian coca leaf. A, upper surface, showing the 

 prominent veinlets ; B, under surface, showing the lines on 

 each side of the midrib. Natural size. 



Description. The following are at present the commercial varieties 

 of coca leaves : 



1. Bolivian or Huanuco (E. Coca}. 



2. Peruvian or Truxillo (E. truxillense] . 



3. Java (E. truxillense). 



Bolivian coca leaves are usually fairly intact. They are brownish 

 green in colour, and oval in outline, varying usually from 4 to 8 cm. 

 in length and from 2 '5 to 4 cm. in breadth. Both surfaces are glabrous, 

 and the lateral veins and veinlets are distinctly prominent. The 

 margin is entire, and the lamina tapers towards both base and apex ; 

 the latter is acute, the midrib projecting in the form of a minute 

 horny point (apiculus) which, however, is frequently broken off. 



