224 
BRITISH CENTRAL AFRICA 
Grewia (often twelve feet in circumference with black hard wood in the middle 
through which no insect can penetrate); various species of Vitex; the 
Parinarium; the Afzelia (whose bark is often made into boxes); the Ebony 
(Diospyros) ; the Ironwood ( Copaifera) ; the Msuko ( Uapaca kirkianci) ; and the 
Mlanje Cedar ( Widdringtonia whytei). 
SANSEVIERIA FIBRE PLANT 
Drugs are obtained from the Strophanthus creeper 1 (used for poisoning 
arrows and killing fish, valuable in affections of the heart); from the Erythroph- 
Icewn (the bark of which produces a violent emetic or poison known as Muavi)\ 
from the roots of certain nettles (which furnish purgatives); from the seeds of 
the Crotons, the Castor oil plant, certain beans, euphorbias, and innumerable 
1 The Strophanthus may be recognised by the extraordinary position of its two seed pods which grow 
exactly at the end of the stalk and opposite to each other so that they look like one large pod placed at 
right angles to the end of the stalk. 
