Wood Betony is one of the earliest of the colorful Southern Ohio prairie bloomers. The pink and red of the blooms can be seen for quite a distance. Look for it in prairie openings, especially along a woodland edge. 
From above, you can see a lovely pin-wheel pattern. 
This is a perennial plant that spreads by way of rhizomes. It can sometimes form large patches. 
Photos taken on April 25, 2010 in Adams County, Ohio.