Sorry I can't do a photo. I have a 'gift' flower amongst my coneflowers in a sunny garden. It's just shot up since the beginning of August. I'm 30 miles north of Chicago. Best I can describe:
Four feet tall. Multiple stalks from the base.
Leaves are single, green, not glossy, largest are 4" long, 1 1/2" inches wide at base, to a narrow tip, smooth edged, whitish underside.
Flowers are deep purple spikes made up of tiny individual blossoms. One spike at the tip of each stalk and other smaller spikes branching out. Top and largest spike about 6" tall.
My lawn man says it is a perennial, but he doesn't know the name.
Thanks for any ideas.