Very pale blue flowers with prominent red anthers. An important clematis, one of the large flowered species used in the early crosses, resulting in the first large flowered hybrids. The name 'patens' refers to the fact that the plane of the tepals is at right-angles to the stem.

Approximate height:	2.0 - 2.5 metres
Flowering period(s):	May Jun Sep
Aspect:	Sun or semi-shade
Pruning:	Light prune (Group 2)
Country of origin:	China
Parentage:	Species
Other name(s):	caerulea; c grandiflora; azurea; a grandiflora; florida; kasugunuma; luloni
Further detail:  Flower diameter: 8-15cm Tepals: 6-8, 4-7cm long, 1.8-3cm wide Database entry: 359