Clematis: Name this Clematis!, 0 by QueenB

QueenB wrote:
I bought this one at Lowe's yesterday. It was the only one like it on the shelf, and the tag I got for it is the wrong one. I know the picture is bad, but I wanted to take it before the flower fell apart. All 5 of the main petals are deep blue-violet, and the center spikes are a few shades lighter. Does anyone have an idea who this could be? I've never grown one before, although I do grow a lot of vines.

Stacey