One more mystery.

It's on the tip of my tongue, Arlene, but I can't bring it to the front of my mind. It'll come to me later, I'm sure.

Comtesse de Bouchaud is the one I was trying to think of, Arlene.

Does it look like Mrs. Cholmondeley? I'm stumped on what they sent. My records show I planted Dawn there but they sent me something else.
Arlene

No, they probably did send you Dawn. That was another possibility I considered. Dawn usually looks more silvery, but I've seen it looking like your photo.

Maybe Blue Ice?

No, Blue Ice starts out white and gradually develops a little bit of a violet tinge. And the tepals are more pointed than round.

Clematis Ice Blue™