12 October 1999.
Iowa, United States
Locality: West side of Larch, 1 mile north of intersection with County Highway E16, Monona County.
Coordinates: 42.1686, -96.0594
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Roadside ditch along margins of corn field.
Comment: Population size of ~500 plants.
Collector(s):