United States, Illinois, Tazewell Co., Washington, Caterpillar, Inc. proving grounds and adjoining drainages; Washington quadrangle. T26N, R3W, Sec. 9, NE¼, NW¼; Sec. 4, SW¼.
40.7036 -89.4073
Acer saccharum- Quercus rubra forest, glacial till; local, ca. 200 plants at tip of narrow ridge between two drainages.