28 RUBBER IN BRITISH AFRICA 



Species of Euphorbia and Conopharyngia, which 

 furnish resinous products, also occur in the Transvaal. 



Natal 



The rubber vine Landol'phia Kirkii, Dyer, known 

 locally as " Ibungu," is indigenous in the forests of 

 Tongaland in the northern portion of Natal, and is the 

 source of the rubber produced in the Colony. The 

 amount obtained is, however, only small at present. A 

 species of Ficus {Ficus utilis, Sim) which yields a rubber- 

 lUvC material also occurs in the same district. 



Recently quantities of the resinous product prepared 

 from the latex of Euphorbia Tirucalli, L., have been 

 exported to Europe, Avhere the material is bemg utilised 

 for cert am technical purposes. 



Rhodesia 



The indigenous rubber-yielding plants of Rhodesia 

 include species of Landolphia, Clitandra, and Carpodinus, 

 which occur principally in Northern Rhodesia. The 

 most important vine is Landolphia Kirkii, Dyer, but 

 several shrubby plants which fm'nish rubber also occur, 

 including Lamlolphia parvi folia, K. Schum., Clitandra 

 henriquesiana, K. Schum., and Carpodinus gracilis. Stapf. 

 The existence of a number of other native rubber-yielding 

 plants has been recorded, but the botanical identity of 

 these has not been definitely determmed. 



A number of exotic rubber trees have been tried 

 experimentally in Rhodesia, and up to the present time 

 the Ceara tree [Manihot Glaziovii) has given the best 

 results. 



