United States, Illinois, DuPage, Morton Arboretum, James 'Pate' Philip State Park near Bartlett, north of Stearn Road near the DuPage-Kane County Line.
Marsh
Alisma subcordatum Raf.; Glyceria septentrionalis Hitchc.; Lemna minor L.; Polygonum coccineum Willd.; Populus deltoides Marshall; Sagittaria latifolia Willd.; Scirpus fluviatilis (Torr.) A.Gray; Sium suave Walter; Spirodela polyrhiza L. Schleid.; Typha latifolia L.; Wolffia columbiana H.Karst.