Artemisia tripartita is a species of flowering plant in the aster family known by the common name threetip sagebrush. It is native to western North America from British Columbia to Nevada and Montana to Colorado. It covers about 8.4 million acres (3.4 million hectares) of the Rocky Mountains and Great Basin. This plant is common and can be dominant in some regions, including the steppe of Washington, the sagebrush of southern Idaho, and the grassland and shrubland in western Montana. It grows on steep slopes and rocky, shallow soils. It tolerates dry soils well.