I. Purpurea frenzy
Here is a lovely mix of my purpureas from this season. All of them are volunteers. They changed color with the change of weather, stayed open later as it cooled, and gave me a surprise almost everyday. I know they can get a bit invasive but where mine were it was fine. I won't be without them and next year they will cover my new arbor!
Here is a link that might be useful: Purpurea Mix