The Duchess of Cornwall

Type: late flowering
Height: 4 to 5 feet
Blooms: Summer
Pruning: Full Prune
Zone: 4

The flower color on this clematis can vary depending on the time of year
and the amount of light it gets. The brilliant yellow center will show off
its various shade of blue-purple wonderfully!

Wouldn't The Duchess of Cornwall look terrific planted with Sarah Elizabeth?