I just looked up Millettia taiwanensis and it's a perfect match! http://www.projectnoah.org/spottings/14921152
(hopefully the link works!). How exciting! Thank you David! I think I'll be able to sleep tonight!

I have a couple of these plants purchased from the nursery. Yes, they are millettia taiwanensis, also in the pea family. In North Texas, mine is deciduous, it blooms in the summer and on perhaps. It is nicely fragrant. I would classify it as a understory bush, it creeps up nearby surfaces but also supports itself to some degree. They are 3'-5' tall and about the same width. They don't require much care, and mine are in a location that gets winter shade, just on the north side of the house under the eave.