Thanks, Pippi!
The purple clematis in the photo is 'Venosa Violacea':
http://davesgarden.com/guides/...
It is a prolific bloomer and will bloom twice every year. Once in spring and once in fall. I love it!
It has done very well for me the past few years since I first planted it. I have it in a container currently and it is not doing quite as well. I believe that is because it is in too much shade. In the spring, I will move it to a sunnier spot. I have had very good luck with several different clematis in my zone in Florida, much to my surprise and delight. I didn't know if they would do well here or not.
Thanks for asking!
~Becky~