The Indigenous “ Rubber” Trees of British Guiana, 25 
said to be very sticky. The rubber is reported to contain a large percentage 
of caoutchouc, but when the resins are removed it is recovered in a soft, sticky, 
unworkable condition, very similar to the pure “rubbers” obtained from 
Hevea confusa. The investigation of this plant does not appear to have been 
carried beyond Mr. Jenman’s original enquiries. 
Plumiera saccuba is found scattered throughout certain districts of the 
colony, and is generally known in the forests under the general term ~ maboa.”’ 
It grows into a fair sized tree and has large simple leaves, and fragrant yellowish- 
white flowers. It produces, at certain times, a fair quantity of latex, which 
appears to be resinous in character. An examination of the latex and of the 
final product that can be obtained from it has yet to be undertaken. 
Numerous species of Tabernaemontanas abound in the colony, of which 
T. utilis, T. rupicola, and T. undulata yield latexes from which rubber- 
like substances can be procured. These products appear to be resinous but 
are worthy of further investigation. Tabernaemontana utilis is known as the 
cow-tree and to the Indians as hya-hya. This last term however appears to be 
a general one as it is applied by the Arawacks to Sapium Jenmani. 
Another tree that produces latex, from which can be obtained a sticky, 
resinous substance is known to the Indians as barta-balli. Samples of the 
“rubber” obtained by Mr. Jenman were reported upon as being of no com- 
mercial value, being soft and sticky. The botanical determination of this tree 
has yet to be made. 
