14 October 1999.
Iowa, United States
Locality: West side of 200th Avenue, 0.1 mile south of intersection with 162nd Street, Fremont County.
Coordinates: 40.8100, -95.8039
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Narrow band of roadside ditch along margin of harvested soybean field.
Number of plants sampled: 120
Comment: ~120 plants sampled from a population size of 500.
Collector(s):