United States, Minnesota, Winona, in the Whitewater Wildlife Management Area, North Branch Unit. Floodplain of the North Fork Whitewater River, just east of the western boundary of Winona County,
44.1 -92.08 +-200m.
T107N R10W sec06
In terrace forest with supercanopy of Populus deltoides and Salix nigra, with frequent gaps due to dead elms.
Associates include Laportea canadensis, Asarum canadense, and Verbena urticifolia.