Saururus cernuus

Family: Saururaceae
Common Names: Lizard's Tail, Lizard's-tail, Breast Weed

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