United States, Illinois, Iroquois, Iroquois County State Conservation Area. UTM 16, 450154mE, 4536704mN. 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. Growing with Glyceria striata, Galium sp., Iris shrevei, Populus deltoides (scattered), Salix exigua, Cornus racemosa, Platanthera flava, Cacalia plantaginea, etc. About 400 Platanthera individuals here.