Purplestem aster is a common wetland fall flower. Wetlands in this case included a roadside ditch. One can hardly drive by a display like this one. The large dense patch was exceptional. Purplestem is a puzzle with a lot of variables. It may have blue to white flowers, colonial growth or not, and fuzzy stems or not so much. It grows in AL, CT, DE, GA, IA, IL, IN, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, ND, NE, NH, NJ, NY, OH, PA, RI, SC, SD, TN, TX, VA, VT, WI, WV, through Canada except for YT, and on SPM. Lenawee Co MI, 9/23/17.