Microsteris gracilis var. humilior (Hook.) Cronquist (Polemoniaceae) is native to Alberta, Argentina Northeast, Argentina Northwest, Argentina South, Arizona, Bolivia, British Columbia, California, Chile Central, Chile North, Chile South, Colorado, Idaho, Juan Fernández Is., Mexico Northwest, Montana, Nebraska, Nevada, New Mexico, Oregon, Peru, South Dakota, Utah, Washington, Wyoming, Yukon. Flora of the World documents 3 occurrences across 1 country.
