From Flora of Indiana (1940) by Charles C. Deam
In 1933 I found scattered plants of this species in ballast along the railroad for a quarter of a mile about 4 miles south of Vincennes, Knox County. Nieuwland has collected it in St. Joseph County. In 1901 Stuart reported it as found along the railroad south of Lafayette. Peattie reported it from the prairies of the Calumet District near Lake Michigan.