United States, Minnesota, Dakota, Dakota Co.; Ft. Snelling State Park near Seneca Plant; along RR tracks; T 27N R 23W SW1/4 of NE1/4 of Sec 18;Fort Snelling State Park;027N;23W;18
44.825884 -93.216999 +-2000m. WGS84
In gravel along RR tracks. Associated with Ambrosia artemisiifolia, Bromus inermis.