Many species of asters are populating the holler these days. I'm no more certain of their identities than I was last year, but I enjoy having them around me nonetheless!
White Wood Aster (Aster divaricatus), maybe? Last year I had decided these were Lowrie's asters, but now I'm going to have to do a more detailed observation of the leaves to decide for sure. [Photo credit: Cathie Bird, 8 September 2012]