Or as I like to call it, tropical Wisteria.
And it really does remind me of wisteria. Long racemes in either purple or white, drip from the vine.
Although it is certainly possible to train it into a tree form as well.
Apparently the leaves have a rough texture, leading to a common name of Sandpaper vine, a not very attractive name for such a pretty flower.
But looking it up online, I also found the names Queen’s Wreath, Purple Wreath, and the prettiest of all, Fleur de Dieu.