262 
African Vine Rubber (Landolphia spp.). 
British and Foreign Tropical Africa. Believed to come exclu- 
sively from wild vines but under experimental cultivation in 
West Africa and other Colonies. See A.B. Add. Ser. ix. 
Part iii., p. 428. 
Borneo Rubber (Willughbeia spp. and Leuconotis spp.). 
Borneo and Malaya. 
Central American Rubber (Castilloa elastica, Cerv.). 
BrivisH.—British Honduras. Forriagn.—Nicaragua, Guate- 
mala, Mexico, Ecuador 
Cultivated with success in Trinidad, and under experimental 
cultivation in most of the British Colonies in the Tropics, having 
been distributed from Kew, beginning about 1875, to Ceylon, 
Singapore, Fiji, Mauritius, West Africa, West Indies, &c.; also 
to Java. See K.B., 1899, p. 159. 
Mangabeira Rubber (Hancornia speciosa, Gomez). 
ForEIGN ——Brazil, chiefly shipped from Pernambuco and some- 
egy eI ‘Pernambuco Rubber.” K. B., 1892, p. 67; 1899, 
R 
Abba Rubber (Ficus Vogelit). 
BririsH.— West Africa; sometimes called ae Rubber.’” 
For particulars see K.B., 1888, p. 255; 1890, p. 
Touckpong and Colombian Virgen Rubber (Sopiwm spp.). 
BritisH.—Guiana.—Forr1en.—Colombia, Bolivia, &c. Some- 
times also called ‘ Bolivian,’’? ‘“‘ Colombian,’’ or ‘‘ Esmeralda’’ 
‘“ Serap Rubber.’ 
Guayule (Parthenium argentatum, A. Gray). 
i imi aca K.B., 1907, p. 285; 1908, p. 255; 1910, 
p- , 
Colorado Rubber (Hymenozys sp.). 
Forreran.—Colorado. 
Both of these plants are wild, yielding an inferior description 
of rubber, and are exc eption nal. as belonging to C tae, an 
Order not usually associated with the geucust obtained ea trees 
with a milky juice.—A pocynaceae, Euphorbiaceae, 
The foregoing are the principal rubbers of onddni! and the 
rdi 
imports into this country are usually entered according to 
sions: Gambia, Sierra Leone, Gold Coast, Nigeria, Natal, East 
Africa Protectorate, Zanzibar and Pemba, Indi 
ments, Federated Malay States, Ceylon and Dependencies, 
Borneo, &e. (from whence, in 1913, came 776,790 centals, value 
