Thanks for the larger image, the petals seems sympetallous common in Solanaceae, but the tips are notched and divided, that is not common (I never know any Solanaceae with that traits,... but my knowledge is way limited). The stamen seems free, most Solanaceae will have connivent anthers, but this one seems free.
in this case I am sorry I will retract mt former oppinion, it might be something else, not a solanaceae perhaps. I wish other member will have their opinion. in the future if you visit that place again I wish you can also get a pictute of fruit... it is interesting indeed