Culver's-root is a moderately tall prairie plant that produces these spikes of flowers at the top. The spikes are up to about six inches long. This has been shown to be among ancestral plants of the more modern genus, Veronica. Indians used this as an emetic and cathartic. Culver was a doctor who adopted those uses to pioneer medicine. Culver's-root is found in AL, AR, CT, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA(T), MD, ME, MI, MN, MO, MS, NC, ND, NE, NJ, NY(T), OH, OK, PA, SC, SD, TN, TX, VA, VT(E), WI, WV, MB, NS, and ON. Lenawee Co MI, 7/20/10. Plantain family, Plantaginaceae.