United States, Illinois, Iroquois, On floodplain on northeast corner of Iroquois River and Chicago, Milwaukee, ST. Paul & Pacific Railroad.
T. 27N, R. 11W, SW1/4 NE1/4 Sect. 21
Floodplain of Illinois River and edge of railroad. Plant caespitose with sterile stems. Growing under Acer saccharum, Ulmus americanum, and Lindera benzoin.