12 October 1999.
Iowa, United States
Locality: Near 2065 Glen Ellen Road, 0.7 miles east of Old Lakeport Road (County Highway K29), Woodbury County.
Coordinates: 42.4156, -96.3314
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Roadside ditch at the beginning of a flood plain. Well drained soil.
Number of plants sampled: 150
Comment: Approximately 150 plants sampled (1-2 heads/plant) from a population size of about 500. Frequently abundant and uniformly distributed.
Collector(s):