Queen-of-the-prairie

Queen-of-the-prairie (Filipendula rubra).  This is a nice plant to find growing at Americus. 

http://en.wikipedia.org/wiki/Filipendula_rubra
http://www.illinoiswildflowers.info/wetland/plants/pr_queen.htm

Here is more Queen-of-the-prairie in its habitat.  Notice the cattails indicate wet soil.