This is also called old field toadflax. It's one of those adventurous little plants that pioneer places other plants no longer go. Places like fields depleted of nutrients on old farms, or depleted by nature that washes the good stuff out of loose gravelly or sandy soil. They're hardy enough that they've also now colonized Russia. They've been sent to Siberia! Here they grow in AL, AR, CA, CT , DE, FL, GA, IA, IL, IN, KS, LA, MA, MD, ME, MI, MN, MO, MS, NC, ND, NH, NJ, NY, OH(E), OK, PA, RI, SC, SD, TN, TX, VA, VT, WA, WI, WV, NB, NS, ON, and QC. Lenawee Co MI, 5/22/14.