The association of native and non-native annual plants with Larrea tridentata (creosote bush) in the Mojave and Sonoran Deserts

► There were 10 times more annual plants in our Mojave site than in our Sonoran site. ► Annual plant abundances were higher on the north side of Larrea tridentata. ► Native annuals in the Mojave Desert were most abundant near the edge of the shrub. ► Native annuals in the Sonoran Desert were most abundant in open areas. ► L. tridentata effects on annual abundances were not consistent between deserts.