Yellow false foxgloves are partly parasitic. Can you imagine it, with roots spreading invisibly through the soil. Seeking something to fasten onto and suck the life fluids out of? Happy Halloween! Smooth yellow false foxglove grows in open oak woods in AL, AR, CT, DE, FL, GA, IL, IN, KY, LA, MA, MD, ME, MI, MO, MS, NC, NH, NJ, NY OH, PA, RI, SC, TN, TX, VA, VT, WV, and ON. Sand Creek Preserve, Hillsdale Co MI, 7/26/12.