This is perhaps the largest and most densely flowered loosestrife. No wonder it is the most popular among gardeners. It occasionally escapes to the wild, and with us is known from CO, CT, IL, IN, KY, MA, MD, ME, MI, MN, MT, NH, NJ, NY, OH, OR, PA, RI, VT, WA, WI, WV, BC, NB, NS, ON, PE, and QC. Cultivated, Houghton Co MI, 7/12/14. Marlberry family.