United States, Illinois, Iroquois, Hooper Branch Savanna Nature Preserve. Leesville 7.5 minute quadrangle. 2 mile south and 9 mile east of St. Anne.
Growing at edge of of sand road and black oak dry sand savanna. Kankakee Sand Area of the Grand Prairie Natural Division. Elevation about 670 feet. Roadside. Formerely cultivated blue and yellow flowered perennial herb.