That's a tough one. I have a couple of ideas, but I will wait until Crystal has a chance to look. She's much better at the ID game than I am...

I looks a lot like triloba.
Mine has two petiole glands up against the base of the leaves, a lot like like P. incarnata. My vine looks horrible because of the virus, but yours seems to be very healthy!

I'll have to look more closely at mine for comparison, but my first impulse was P. actinia.

p.s. Do I owe you an email Karyn? I've been working so hard I can't remember, and I can't find your last email. -shawn

I don't think it's actinia. I have that. The leaves have a similar shape and color but the size and texture are very different. These are also shiny and the actinia foliage isn't. Triloba could be a possibility though there's no petiloe glands on this vine. I had triloba at some point but thought I'd lost it a season or two ago.

Shawn I think we answered each other's emails but I'm happy to hear from you anytime.

I took another look at the vine and there are some leaves with petiole glands. Two very near the junction of the leaf, with a vertical orientation.

P. actinia was my first auto-response with the thumbnails. Then I was considering P. ligularis, but that isn't quite right either. Upon closer inspection, Crystal and I agree it looks like P. triloba. We lost this one last year, so Crystal may be sending you an email about a trade. ;)