Oh, darn it. I found a possible one and posted a link to it, but now I see that I must have closed that tab before I sent the message and now I don't remember the name. I'll look for it again.
Okay, I found it. This is the one that looked promising to me. You can see a tiny piece of a light reverse in one of the photos. I know the tepal colors don't match completely, but it's a difficult color to capture, and the anthers match nicely.
Clematis (Clematis viticella 'Abundance')
