Quercus Arizonica is a species of oak tree that is native to Arizona, hence its name. It is commonly known as the Arizona oak, and has several synonyms that are used interchangeably. Some of these synonyms include the Emory oak, the mountain oak, the scrub oak, and the silverleaf oak. These names are derived from the tree's physical characteristics and its habitat. The Emory oak is named after the American military physician and botanist William Hemsley Emory, who discovered the tree during his explorations in the mid-19th century. The mountain oak and scrub oak are named after the environments in which the tree grows, while the silverleaf oak refers to the leaves' silvery underside.