United States, Illinois, Will, Two miles west of Wilmington, IL; 0.3 mile east of Interstate-55, 0.4 mile north of River Drive, along bluffs on south side of Kankakee River. (WGS84/NAD83)
41.3263699 -88.1856499
T. 33N, R. 9E, S 1/2 Sect. 22
Floodplain habitat at base of wooded slopes, along Kankakee River. Associates included: Angelica atropurpurea, Aster simplex, Carex grayi, Impatiens capensis, Laportea canadensis, Ranunculus septentrionalis, Rudbeckia laciniata, Verbisina alternifolia.