X INTRODUCTION 
A valuable discovery from an economic point of view is that 
of Poga oleosa Pierre (Rhizophoracee), hitherto known only 
from the Gaboon, the seeds of which are remarkably rich in oil. 
As indicated in Mr. Talbot’s note the district adjoins the 
Cameroons and is botanically an extension of the evergreen rain- 
forest area of that district. The systematic list shews that the 
flora is practically identical with that of the Cameroons; a pro- 
portion approaching half the plants collected has hitherto been 
known only from that area. Apart from this endemic or 
Cameroons element there is a strong representation of what may 
be called the Gulf of Guinea flora, that is of species more or less 
widely distributed from Sierra Leone to the Gaboon. The more 
Southern Congo-Angolan element is much less marked and the 
collection contains comparatively few plants representing a 
general tropical African distribution. 
In the determination of the plants considerable help has been 
obtained from the rich tropical African material in the Herbarium 
of the Royal Gardens, Kew ; our thanks are due to the Director 
for some determinations in the order Euphorbiacex, and also 
to members of the Staff for advice kindly given in connection 
with other orders. Specimens of a large proportion of Mr. and 
Mrs. Talbot's plants have also been presented to Kew.—-[A. B. R.] 
