United States, Illinois, Iroquois, Kankakee Sand Area Section of the Grand Prairie Natural Division. Iroquois County State Conservation Area. Northeast corner of Iroquois County. Elevation about 655 feet. Donovan Quadrangle.
In degraded marsh. Growing with Cephalanthus occidentalis, Phalaris arundinacea, Polygonum amphibium, Polygonum punctatum, Scirpus cyperinus.