Clematis alpina 'White Moth', April May, Once given good drainage the Atragene group are useful garden plants. They can thrive in cold, windy situations and make ideal plants for north and east walls.
Clematis macropetala 'Lagoon' is the darkest of the blue macropetala clematis. To bring out the best colour in its blooms, it is best to display them against a dark background. Later flowering than most other macropetala clematis, it blooms from mid-late spring. Like all early-flowering clematis, it requires little pruning other than the removal of any dead or damaged growth after flowering.
Pale leather flower (Clematis versicolor) [July 10, 2014] at Hayefield.com Another possible clematis species alternative to Virgin's bower. Not sure if its native or grows in our zone.:
Clematis Alba Luxurians: flowers from July to September and is best planted to scramble through a mature, spring-flowering shrub such as a viburnum or holly. Pruning is easy, just cut back hard early in spring. 2.5-3m (8-10ft).
Philadelphus 'Virginal' Mock Orange
Clematis florida ‘Alba Plena’
Clematis 'Pink Flamingo' (alpina)
クレマチス フロリダ ‘ペパーミント’ ２年苗｜おぎはら植物園
Clematis florida 'Peppermint'
Clematis Betty Corning - one of the heaviest scented clematis