Strychnos spinosa

Strychnos spinosa, the Natal orange, also called Mokotra in Madagascar, is a tree indigenous to tropical and subtropical Africa. It produces sweet-sour yellow fruits, containing numerous hard brown seeds. Greenish-white flowers grow in dense heads at the ends of branches (Sep-Feb/Spring - summer). The fruits tend to appear only after good rains. It is related to the deadly Strychnos nux-vomica, which contains strychnine. The fruit are large, smooth, and firm, transitioning from green to yellow as they ripen. Inside the fruit are tightly packed seeds, which may be toxic, surrounded by a fleshy, brown, edible covering. Animals such as baboon, monkeys, bushpig, nyala and eland eat the fruit. The leaves are a popular food source for browsers such as duiker, kudu, impala, steenbok, nyala and elephant....read more on Wikipedia.