Flowers of the Vangeria infausta or Wild Medlar tree. "Medlar" is a medieval word for apple-like fruit although these taste nothing like apples, maybe a little bit like dried guavas.
The trees will have fruit on them around December or so. This is a budding tree with last season's fruit on it. There is leftover fruit because there are no monkeys left to eat them and no humans in the area, apart from this one, picks them. They are high in vitamin C although they have very little flesh and large seeds.
Wild Medlars always come with their very own pests, a species of plant mite that attacks this tree only, forming these weird little wart shapes on the leaves. It doesn't seem to bother the tree that much.