04 September 2006.
Iowa, United States
Locality: Near a concrete boat ramp, west bank of the Des Moines River, north of U.S. Highway 30 bridge, Boone County.
Coordinates: 42.0369, -93.9275
(Map it)
Georeference protocol: Lat/Lon determined via Map location
Environment description: Clay soil, especially among rip-rap rocks above river sand deposits and below the perennial terrestrial plants. The area is periodically flooded. Estimated population size of 350.
Number of plants sampled: 200
Comment: Mixed with Echinochloa crus-galli collected as DB 2006182. Second collection made on 10/07/2006.
Collector(s):