an evergreen shrub (Larrea divaricata) of the caltrop family with a pungent odor like that of creosote, found in N Mexico and the SW U.S.
See creosote bush in American Heritage Dictionary 4
noun
Any of several resinous aromatic evergreen shrubs of the genus Larrea, especially L. tridentata, a yellow-flowered plant characteristic of warm deserts in the southwest United States and Mexico.