It gets its name from the variation in colors from lavender, to pale blue, to white as the blossoms mature. If it wasn't in a pot, it may reach a height of 8 feet, but I honestly don't know where I would put it, so there it will stay. Also known as the morning-noon-night or Brazil raintree, its a member of the nightshade family (Solanacae).
Here it is after a full cycle of blooming. It should rest for a while and then start over again.