25 August 2008.
Illinois, United States
Locality: Black Hawk Forest Nature Preserve, Rock Island, Rock Island County.
Coordinates: 41.4658, -90.5728
(Map it)
Elevation: 186m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Wooded understory. Essentially full shade. Generally located along north facing 40% slope.
Number of plants sampled: 18
Associated species: Quercus rubra, Staphylea trifolia, and Tilia americana.
Comment: Population of approximately 50 plants. Very few fruits still present at time of collection. Permission to collect granted by Paula Cross, Illinois Historic Preservation Agency.
Collector(s):