Mesua ferrea.

Botanical name: 

Mesua ferrea Linn. Guttiferae. Ironwood.

Java and East Indies. The fruit is reddish and wrinkled when ripe, with a rind like that of the chestnut. It resembles a chestnut in size, shape, substance and taste.

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