August 1991.
Wisconsin, United States
Locality: Collected near Portage, Columbia County, WI as a living plant that survived a field herbicide application and was transplanted to a greenhouse at the University of Wisconsin, Madison. As described in the 1995 Weed Science paper, by Stoltenberg and Wiederholt, and in notes from Dekker.
Coordinates: 43.5390, -89.4620
(Map it)
Georeference protocol: Center of 3rd Order Admin Level
Habitat: Field
Environment description: From a carrot, onion, and corn cropping system.