The picture didn't capture the true color: it is very dark red purple. Can someone ID her?
Here is a link that might be useful:
Looks like Clematis "Jackmanii" to me...Jeanne
Here is a link that might be useful: Jackmanii
There are so many dark purple ones
I'm a recent admirer of clematis, but it looks a little like Clematis Romantika in terms of the shape of the petals! See a picture here: http://www.homeofclematis.net/romantica.html Another that looks close is serenata: http://www.homeofclematis.net/srenata.html
Please post a follow-up if you figure it out! Or, if you don't and would consider sharing some seed, please e-mail at firstname.lastname@example.org!