Homer LeRoy Shantz (1876–1958) was an Americanbotanist and former president of the University of Arizona. Born in Michigan, Dr. Shantz grew up in Colorado Springs, CO, and received his doctoral degree in botany from the University of Nebraska in 1905. He traveled widely, with an emphasis on the American West and Africa, and made documentary photographs wherever he went. Among Dr. Shantz's research interests was photographic documentation of vegetation change. He served as the President of the University of Arizona from 1928 to 1936, where he focused his attention on Arizona and the Sonoran Desert. In 1936 he resigned after disagreements with the Legislature and the Board of Regents.  From 1936 he served as Chief of the Division of Wildlife Management of the U.S. Forest Service until he retired in 1944, and later worked with the Geography Branch of the Office of Naval Research to re-photograph many of the sites he'd documented earlier in his career.