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.
[1] 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 the South American Myrtaceae, devoting particular study to the genus Psidium (which includes the commercially important guava).
Other concentrations include the Chilean species of the widespread genus Berberis, the usage of computer models in evaluating methods of phylogenetic analysis, and serving on a committee of botanists (including D.J.
Landum is one of the original scientists to participate in the Ask A Biologist program and the subject of the "Smashing Success" article detailing his work with ASU Vascular Plant Herbarium.