United States, Illinois, DuPage, Morton Arboretum, Oak Meadows Forest Preserve in Wood Dale, west of Wood Dale Road at the north end of the driving range.
41.946454 -87.978889 +-122m. WGS84
based on Collectors description
Oak woodland
Quercus macrocarpa Michx.
The tree was 20 inches in diameter and has characteristics of both Quercus bicolor and Quercus macrocarpa.