25 September 2009.
Illinois, United States
Locality: Four Corners Road, north from Illinois Highway 84, NW 1/4 of SW 1/4 of Section 36, T26N, R2E, Blackhawk (IL-IA) Quad, Jo Daviess County.
Coordinates: 42.2050, -90.2294
(Map it)
Elevation: 192m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadside along ditch. Associated with Andropogon gerardii, Convovulus sepium, Spiraea alba, Toxicodendron radicans, and Vitis riparia.
Number of plants sampled: 13
Collector(s):