Helenium flexuosum

Family: Asteraceae
Common Names: Purplehead Sneezeweed, Purple-head Sneezeweed 

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

Additional Resources:
Flora of North America