This is a Monarda Citriodora or maybe better know as Lemon Beebalm, Purple Horsemint, Lemon Mint, Plains Horsemint, Lemon Horsemint, Horsemint or Purple Lemon Mint.
By reading about it, I learned that it smells good. I took this photo in the park by the tall sunflowers, so will go back and smell.
For this week I'm hoping to do 1 color (or shade of colors) instead of one plant.