13 October 1999.
Iowa, United States
Locality: West side of Hamlin, 1.1 miles north of intersection with 235th Street, Harrison County.
Coordinates: 41.6844, -95.9631
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Roadside ditch along margin of corn field. Associated vegetation: Helianthus grosseserratus (not collected).
Number of plants sampled: 100
Comment: ~100 plants sampled from a population size of ~200. Population on the smaller side.
Collector(s):