Terminalia subspathulata of the Combretaceae.
Corner (1988) wrote “There is a tree of this species in the Singapore Botanic Gardens… … The fruits ripen and blow away about July and August”.
The tree in SBGardens is a real handsome and grand one, at Maranta Avenue.
Corner, E.J.H. (1988). Wayside Trees of Malaya.Vol 1. The Malayan Nature Society, KL, Malaysia