Leonia glycycarpa.

Botanical name: 

Leonia glycycarpa Ruiz & Pav. Violaceae.

A tree of Peru, the fruit of which is called achocon. The fruits are the size of a peach, with a rough, netted skin and sweet pulp, which is eaten by the Peruvians and is much relished.

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