Giselle

Type: late flowered
Height: 3 to 4 feet
Blooms: Summer
Pruning: Full Prune
Zone: 4

Finally! A Full Prune clematis small enough for a container!
Giselle would also be a terrific addition to a small garden.

She would be lovely with Samaritan Jo or Minister.
Or both, if it's too hard to choose.