United States, Illinois, Mason, South of Havana along main highway (Route 78) south towards Bath. Havana Quadrangle, elevation about 450 feet. The Illinois River Section of the Illinois & Mississippi Rivers Bottomlands Natural Division. Growing in a series of seep areas along White Oak Creek. (WGS84/NAD83)
40.25666 -90.08663
Growing on hillside seep along edge of White Oak Creek with Celtis occidentalis, Fraxinus nigra, Platanus occidentalis, Quercus rubra, Robinia pseudoacacia, Sassafras albidum, Rosa palustris, Boehmeria cylindrica, Cinna arundinacea, Eupatorium maculatum, Impatiens capensis, Leersia virginica, Stachys tenuifolia, Symplocarpus foetidus, etc. Perennial herb with white flowers.