This is the Pale Purple Coneflower, Echinacea pallida, whose reflexed ray flowers I can't resist, though it's native to places south of Minnesota. In the foreground are leaves of Astragalus canadensis, Canada Milk Vetch, just preparing to bloom now on July 7th. In the background is the lively Prairie Sage, Artemisia ludoviciana. This one runs heartily, so plant a little and watch it cavort ! I find that any native plant that runs like this is easy enough controlled by pulling the runners, but of course if you mistakenly planted alot of it, well, you might be busy for awhile each season. Many milkweeds run like this also, but the Butterfly Weed is very well behaved, just expanding into a nice clump.