I finally found this wonderful site. http://www.clematis.hull.ac.uk/new-clemalphasearch.cfm
that you all having been referring to.
I had been using http://www.clematis.com.pl/wms/321.html&plant_number=386 which was much more awkward for my old brain.
Hope this helps us beginners.
Clematis on the Web
CotW helped fuel my passion for clematis.
There was a time when I thought I'd look at every clematis on CotW with photos; I got mid way through the letter B. Then I started having fantasies of selling the house and move to a place with a lot of land after overindulging on the picture search feature. I slowly came to grips with the sad reality that I could not afford to collect every variety of clematis on the planet.
Have fun!
cotw is the bible