29 September 2012.
Illinois, United States
Locality: Along south side of East Kansas Avenue, west of intersection with S16000E Road (Michigan Avenue), approximately 8 miles southwest of Lake Village, Kankakee County.
Coordinates: 41.0899, -87.5640
(Map it)
Elevation: 205m.
Environment description: Shady oak understory. Sandy soil.
Comment: Population greater than 1,000 plants.
Collector(s):