United States, Illinois, DuPage, Morton Arboretum, University of Illinois Pharmacognosy Field Station. In overgrown field next to lower pond.
Flower: N Fruit: N Vegetation: Y Bud: N
This is a voucher specimen for pharmacological screening. Sample Accession Number(s): GLA15395-Y. Collected under the sponsorship of Glaxo Group Research Ltd., University of Illinois at Chicago, Field Museum of Natural History.