United States, Illinois, La Salle Co., 0.45 mi. W of W 2401 Street (Deer Park Road), N side of IL 71, just W of Covell Creek, ca. 320 m SSW of mi. 237 of Illinois River; W of South Ottawa. T33N, R2E, ca. center of Sec. 21.
41.3169 -88.8858
Deep quartz sand with small silica-sandstone ledge outcrop; sand prairie remnant at W side of sand ridge; with Opuntia humifusa, Cenchrus, Panicum, Arenaria serpyllifolia, Rumex acetosella, Bromus tectorum, Linaria canadensis, Krigia virginica.
{"habit":"Inflorescence purplish, locally dominant grass in open sand, forming multistemmed cirdualr patches ca. 20-30 cm diameter; few yet in flower."}