Texas Gardening: Any TX clematis growers out there?, 1 by TexasDollie

TexasDollie wrote:
I am bound and determined to grow clematis successfully. We're in zone 8b, (San Antonio) and I just "rescued" a clematis from the big box store's clearance rack. (Yes, I know, I know. :~) It has no tag, and I've looked all over, but being new to them, I'm just not sure which one this is.

The flower is 3" wide, and a little more lilac purple than it seems in this photo. I've cross-posted already on the Clematis thread, but wondered if any TX gardeners had advice for the success of these fussy things.
Thanks in advance!