Larrea tridentata
Creosote bush ("Larrea tridentata") and bur sage ("Ambrosia dumosa") dominate valley floors. Indigo bush ("Psorothamnus fremontii") and Mormon tea are other shrubs that may be found. Wildflowers of the Sonoran Desert include desert sand verbena ("Abronia villosa"), desert sunflower ("Geraea canescens"), and evening primroses.