This is one of my favorite flowers, because of its intricate structure. How many petals does it have?
This is a Passion Flower. At first glance, it seems to have ten petals, but five of them are really sepals (the leaves around the base of the flower) pretending to be petals. If you look closely, every other "petal" has a thin, green border. Those are the sepals. On the backside, the sepals are green, while the petals are purple on both sides.