As is true of many flowers, color variations exist and white-flowered I. missouriensis occasionally appear in early spring. Wild Iris is most often found in extensive, dense patches in moist meadows from the foothills to the mountains, but it also grows solitary in open moist woods. Family Foothills, montane, subalpine. Wetlands, meadows, woodlands, openings. Lizard Head Pass, June 27, 2001.
Flower colors vary with soils, rainfall, and, of course, genetics.