Hello, Thank you for your note and photo! You have a native wildflower, commonly called snow-on-the-prairie, Euphorbia bicolor. COMMON NAME: Snow-on-the-Prairie BOTANICAL NAME: Euphorbia bicolor FAMILY: Euphorbiaceae Snow-on-the-prairie is a beautiful, native wildflower found on sunny prairies and roadsides. The plant is currently being studied to identify the chemical composition of estrogens within the plant for future medicinal purposes. Congratulations on having habitat for a terrific native plant species! Julie Massey