At its annual meeting in Chiang Mai, Thailand, in June 2006, the Society for Economic Botany honored Memory Elvin-Lewis, Ph.D., and Walter H. Lewis, Ph.D., “in recognition of outstanding achievement, research and service to the field of economic botany.” This was the first time that two scientists have been simultaneously honored. Elvin-Lewis is professor of biomedicine in microbiology and ethnobotany and has been at the University since 1967, and Lewis, professor emeritus of biology and senior botanist, Missouri Botanical Garden, has been associated with both institutions since 1964. Their research focusing on medical and dental botany has spanned over three decades largely in Amazonia and West Africa. Both remain active in the society, and Lewis served as president in 1990.