13 October 1999.
Iowa, United States
Locality: Ditch between 145th Street and Interstate 680, 1.6 miles east of 130th Street, Pottawattamie County.
Coordinates: 41.3528, -95.9078
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Roadside ditch. Associated vegetation: H. tuberosus (Collection 19).
Number of plants sampled: 90
Comment: ~90 plants sampled from a population size of ~150. Small population.
Collector(s):