Clematis: What is this purple-red clematis? , 1 by MTnic

MTnic wrote:
This picture is a close up of the anthers. I bought this plant as well as three others at a local nursery. I was under the impression that they were all 4 different plants. They all appear to be the same. I bought them last fall. I cannot locate the tags, but I'm pretty sure I thought they were all white- obviously they were all mislabeled! I have never seen Red Pearl or Vino sold locally, but that doesn't mean much either. It really is more purple than the photo suggests but definitely not purple. It really is an odd color. All of them are blooming and have been for a couple weeks, but the anthers look exactly the same on the new ones as the ones that bloomed initially. They are all in full sun and surprisingly I have yet to notice any significant fading.