13 October 1999.
Iowa, United States
Locality: Southeast corner of intersection between 240th Street and Elm, southwest of Onawa, Monona County.
Coordinates: 42.0036, -96.1375
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Bank of roadside ditch.
Number of plants sampled: 80
Comment: ~80 plants sampled from a population size of ~100. Smaller population size than previously collected.
Collector(s):