24 September 2009.
Wisconsin, United States
Locality: Along West Beloit Newark Road, Avon Bottoms State Wildlife Area, west of Newark, NE 1/4 of NE 1/4 of Section 19, T1N, R10E, Brodhead East Quad, Rock County.
Coordinates: 42.5425, -89.3475
(Map it)
Elevation: 235m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Sugar River floodplain/watershed
Number of plants sampled: 10
Associated species: Acer negundo, A. saccharinum, Celtis occidentalis, Juglans nigra, and Vitis riparia.
Collector(s):