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: 42.2003, -90.2294
(Map it)
Elevation: 194m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadside in fence row.
Number of plants sampled: 40
Associated species: Acer negundo, Ascelpias incarnata, Celtis occidentalis, Fraxinus pennsylvanica, Morus alba, Prunus americana, P. serotina, Quercus macrocarpa, and Rhus glabra.
Collector(s):