Pappea capensis.

Botanical name: 

Pappea capensis Eckl. & Zeyh. Sapindaceae. Wild Plum.

South Africa. The fruit is edible. A vinous beverage and a vinegar are prepared from it, and an edible, though slightly purgative, oil is expressed from its seeds. Mueller says the fruit is the size of a cherry, savory and edible.

Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.