Bushman´s poison - Acokanthera oblongifolia

The "Bushman´s poison" or "Wintersweet" as it is also known is a shrub or small tree native to Southern Africa.  It is the source of a poison that is used on bushmen´s arrow tips and is highly toxic to both animals and humans.  The fruits of this dangerous plant contain estrofantina-G and can be fatal is ingested (especially when they are green).  When I first saw this bush I thought that it might be some sort of olive by the looks of the fruits.