Carissa grandiflora.
Botanical name:
Carissa grandiflora, A. DC. Apocynaceae. Amatungula. Caraunda. Natal Plum.
South Africa. The flavor is subacid and agreeable and the fruit is much prized in Natal for preserving.
Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.