Vines and Climbers: Can anyone tell me what vine this is?, 1 by TexasPuddyPrint

TexasPuddyPrint wrote:
A friend had this growing on a fence but she pulled it out because it never bloomed. She never knew the name of it either. Hers had gobs of foliage but no flowers.

I took a cutting home and potted it up. This one ended up twining itself throughout one of my citrus trees. I have no idea what it is though. I recently noticed pale greenish white clusters of what appear to be flower buds but have not seen them open yet...at least I'd think they'd open up more???

I live in the south tip of Texas (zone 9)
~ Cat