[southwestdesertflora.com] Habitat, Range: Habitat Preferences: Desert flats, washes, sandy to fine-gravelly soils; Creosote bush communities; in California; Creosote Bush Scrub, Yellow Pine Forest, Pinyon-Juniper Woodland, Coastal Sage Scrub. Recorded Range: Redroot Cryptantha, is found mostly in the southwestern United States with spotty distribution; AZ, CA, NM, NV, OR, TX, UT. In AZ Redroot Cryptantha is scattered throughout the state. This species is also native to Baja California and northwest Mexico. (link added by Mary Ann Machi)