United States, Illinois, Cook, Bunker Hill Prairie (at Sidney Yates Flatwoods) Forest Preserve, Edgebrook (Chicago), west side of Caldwell Avenue, 1 mile north of Devon Avenue, northwest of first parking area across road; wooded stream slope is next to mowed area.
Degraded scrubby woods, on west facing slope above stream; scattered in area in clusters; sedge with green perigynia; associates: Fraxinus species, Acer negundo, Rhamnus frangula, Hydrophyllum virginianum, Osmorhiza longistylus, Ulmus americana, Alliaria petiolata, Rubus species, Smilacina racemosa, Erythronium albidum, Podophyllum peltatum, Polygonatum canaliculatum.