This is a rather common rainforest tree but I found it be one of the harder species to learn because it does not seem to have any spot characters. But lets enjoy the flowers and fruits first, which are like nothing else.
The flowers are around 1cm and superficially resemble a pea flower. They are much smaller than their endemic relative X. fragrans.
The fruits are drammatic – it “bursts” open to reveal a back seed, like a pearl.
The leaves are pretty non-descript, but if you look hard enough you may find some small dark glands randomly scatter on the leaf underside. The dark yellow and somewhat thickened petiole is also quite diagnostic.
See iNaturalist entries:
https://www.inaturalist.org/observations/107163833
https://www.inaturalist.org/observations/107163835
Leaf Whispering in the Tropics 