CHAPTER II 



THE BOTANICAL SOURCES OF RUBBER 



WE propose to give in the following chapter some 

 description of the different species of plants from which 

 rubber is obtained, and of the methods employed in 

 collecting the rubber from these plants in the wild con- 

 dition. It will be convenient to consider the various 

 species more or less in the order of their geographical 

 distribution. Before doing so we may briefly enumerate 

 the principal plants concerned according to their 

 botanical classification. 



List of the Principal Rubber-yielding Species. 



I. MORACEAE. 



Castilloa elastica, C. Markhamiana. 



Ficus elastica, F. Vogelii and other species. 



II. EUPHORBIACEAE. 



Hevea brasiliensis and other species. 

 Manihot Glaziovii, M. dichotoma, M. hep- 



taphylla, M. piauhyensis and other 



species. 

 Sapium Jenmani and other species. 



