[Wikipedia] Range, Ecology, Food Source: It is native to western North America from southwestern Canada through the far western United States and California, into Baja California.[2] It is widespread and can be found in many types of habitats. Ecology The plant is more common after its habitat is cleared or disturbed, such as by wildfire, clearcutting, or heavy grazing.[3] It is an important food for several species of mice, including the western harvest mouse, cactus mouse, and California mouse.[3] (link added by Mary Ann Machi)