USA, Illinois, Iroquois, Iroquois County State Conservation Area. Donovan 7.5 minute quadrangle. 2 mile south and 7 to 10 mile east of St. Anne. Growing in sedge meadow. Kankakee Sand Area of the Grand Prairie Natural Division. 40° 59 ' 05. 1" North Latitude; 087° 33' 41.46'' West Longitude