Kayri Havens is the Medard and Elizabeth Welch Director of Plant Science and Conservation and Senior Scientist at the Chicago Botanic Garden. Her research interests include the effects of climate change on plant species, restoration genetics, and, of course, phenology. Address: Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL, 60022. E-mail: khavens@chicagobotanic.org