In the Southwestern United States, the range extends into the Colorado Desert of California, and in Arizona. There it occurs south and southwest of the Arizona transition zone of the Mogollon Rim; in the northwest-central Sonoran Desert of Arizona, it is in a few selected locales. It also reaches into the northeast section of the Mojave Desert in southern Nevada and Utah, and in the very southern section of the Great Basin Desert of southern Utah. It also occurs just south of the east-west section of the Bill Williams River, east of the Colorado River in the Yuma Desert.