Duku and langsat are two varieties of the same species. The fruit grows in clusters with separate segments. The skin of the langsat is pale yellow and thin, exuding a sticky sap when peeled, the duku is larger with a slightly darker brownish and thicker skin, with no sap. Both fruits are best eaten when ripe, try not to bite the seed which has a bitter taste. Duku langsat (photo) is a new cross between the langsat and the duku, has the best qualities of both these fruits – a thinner skin from the langsat and a firmer & sweeter flesh from the duku!
Mangosteen (see glossary on mangosteen tree)