United States, Illinois, Ogle Co., W side of IL 2; W side of IL 2; W side of Rock River; 0.5 mi. N of main entrance to Stronghold and Blackhawk Presbytery and camp; upper portion of ridge just below The Castle; S of Mud Creek. T24N, R10E, SE¼, NE¼, SW¼, sec. 28.
42.0478 -89.3456
225 meters
722-738 ft
Loam and humus on dolomite talus; mesic slopes below cliffs, with Acer negundo, Acer saccharum, Aquilegia canadensis, Isopyrum biternatum, Quercus muhlenbergii, Q. rubra, Solidago flexicaulis, Tilia americana, Ulmus americana.
{"habit":"Flowers pale lilac (pale purple), stamens pale yellow to pale lilac; locally common fleshy erect annual herb 0.5 m tall; some leaf damage from late frost."}