I posted about the unusual leaves before. Interestingly, it appears to have 3 types of stamens. The numerous prominent pinkish-purple stamens at its base give rise to a set of predominantly yellow-top stamens, a cluster of longer stamens with purplish anthers protruding above the yellowish ones and another set of the same length as the yellow ones but with white anthers. The flowers are made up of 2 sets of overlapping purple petals and the lower set are narrower and long while the upper set are more roundish.
In fact, the flowers do not remind me of the more common Hibiscus from the same Family. To me, they seemed more similar to Melastoma, Dissotis, Grewia etc. Anyway, there is apparently a white-flower variety. Please refer to the attached links on additional information on the plant: