Pontederia cordata

Family: Pontederiaceae
Common Names: Pickerelweed, Pickerel Weed

Native to USA: AL, AR, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, NH, NJ, NY, OH, OK, OR, PA, RI, SC, TN, TX, VA, VT, WI, WV
Native to Canada: NB, NS, ON, PE, QC 

Additional Resources:
Flora of North America