The late Edward F. Anderson was Senior Research Botanist at the Desert Botanical Garden, Phoenix, Arizona. He was past president of the International Organization for Succulent Plant Study, a fellow of the Cactus and Succulent Society of America, and a member of the Linnean Society, London. In addition, Anderson was professor emeritus, Whitman College, where he taught biology for 30 years. In 1998 Dr. Anderson was awarded the prestigious Cactus d'Or, given by the principality of Monaco for outstanding research on succulents. He authored and contributed to several books, and published numerous papers during his more than 45 years of research on cacti.