13 October 1999.
Iowa, United States
Locality: Just east of bridge, south side of Highway 362, 0.5 mile from intersection with 140th Street, Pottawattamie County.
Coordinates: 41.4914, -95.9275
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Roadside ditch along margin of harvested soybean field. On a slope.
Number of plants sampled: 100
Comment: ~100 plants sampled from a population size of ~250.
Collector(s):