THE PEINCIPAL RUBBER-YIELDING PLANTS 41 



West Africa from Ivory Coast to Southern 

 Nigeria. 

 Clitandra sp., cf. C. laxiflora, Hallier f. Sierra Leone. 

 Clitatidra henriquesiana, K. Schiim. Angola and 

 Northern Rhodesia, 

 (c) Carpodinus spp. 



Carpodinus hirsuta, Hua. West Africa from Sene- 



gambia to Nigeria. 

 Carpodinus leucantha, K. Schiim. Angola. 

 Carpodimis gracilis, Stapf. Belgian Congo and 

 Angola. 

 17. The Asiatic rubber vines belonging to the natural 

 order Apocynacoae. 



A large number of Apocynaceous rubber vines occur 

 in the forests of India, Indo-China, the Malay Penmsula, 

 and the neighbom'mg islands. The prmcipal species are 

 given in the following list : 



Urceola elastica, Roxb. 

 Urceola esculenta, Benth. 

 Willughheia flrma, Blume. 

 Chonemorpha inacrophylla, G. Don. 

 Rhynchodia Wallichii, Hook. f. 

 Ecdysanthera micrantha, A. DC. 

 Parameria glandulifera, Benth. 

 Hymenolophus Romhurghii, Boerl. 

 Michrechites napeensis, Quint. 

 Xylinaharia Reynaudi, Jum. 



Many of these vines yield rubber of very good quality, 

 but the value of the product is often reduced by the 

 native methods of preparation. The following analyses, 

 made at the Imperial Institute, will indicate the com- 

 position of the dry rubber from certam of the vmes : 



