United States, Minnesota, Big Stone, Big Stone Co.; Ca. 1.5 mi ENE of Ortonville; waterfowl area E of co. rd. E1/2 Sec.11 T121N R46W (Ortonville Twp.).;Redhead Marsh Wildlife Management Area;121N;46W;11
45.305307 -96.399909 +-1000m. WGS84
In disturbed ground, with Setaria viridis, Amaranthus retroflexus, Achillea millefolium.