American botanist.
Leslie Roger Landrum (born 1946) is an American botanist serving as senior research scientist at Arizona State University School of Life Sciences, and curator of the ASU Vascular Plant Herbarium. He attained M.S. and Ph.D. degrees from the University of Michigan, and has been at Arizona State University since 1986. From 1969 to 1973, he worked with the Peace Corps at the Forestry School of the University of Chile, where he gained an interest in the flora of South America, particularly the myrtle family (Myrtaceae). Since then, he has published descriptions of new genera and species within th