Betty Corning

Clematis 'Betty Corning'

http://davesgarden.com/guides/pf/go/69288/

In the above link, note the comment that one person has it growing in mostly mottled shade.

The following link describes the origins of the vine and the person it was named for:

http://areasonedlandscape.com/?p=927

And last but not least note that there is a lot of variation in the descriptions of hardiness, some as cold as 3 and some as warm as 6.