Clematis: Clematis ID, 1 by birder17

birder17 wrote:
I have had this clematis for a long time. I just cannot remember what its name is. It is the first clematis to bloom by about 5 days. HF Young started blooming today. It is under a dogwood tree so is pretty much in shade.

The first picture is a completely open bloom. The second picture is a bloom that hasn't completely opened. Cameras don't always reflect the correct color. The color is a light red-violet and the centers (stamens?) are an off white--sort of a grey white.

I have an idea what it is from my own research, but I would like for you to tell me what you think it is.