United States, Illinois, DuPage, Morton Arboretum, The Morton Arboretum, West Side, grid S-09/area. Growing along the gravel trail about 75 feet west of the [Schulenberg] Prairie Visitor Station (N side of trail).ollected from one of two small colonies containing a total of about 75 open flowers. In an area dominated by grasses.
In an area dominated by grasses such as Agropyron repens; Bromus japonicas; Dactylis glomerata; Phalaris arundinacea and Poa pratensis. Other associates included Medicago lupulina; Melilotus alba and Solidago.