Chamaecrista fasciculata var. fasciculata 

Family: Fabaceae
Common Names: Partridge Pea, Showy Partridge-pea, Beeflower

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