26 July 2012.
Illinois, United States
Locality: Waterfall Glen County Forest Preserve, SE 1/4 of Section 17, T37N, R11E, Sag Bridge and Romeoville Quad, near Darien, DuPage County.
Coordinates: 41.6898, -88.0015
(Map it)
Elevation: 199m.
Environment description: Bluffs. Dry, shallow soils.
Number of plants sampled: 9
Associated species: Lonicera maackia, Quercus, and Viburnum prunifolium.
Comment: Numerous specimens growing together as localized population. Trees starting to show damage from Emerald Ash Borer at time of collection.
Collector(s):