Adrienne Elizabeth Clarke AC, née Petty (born on (1938-01-06)6 January 1938) is Professor Emeritus of Botany at University of Melbourne, where she ran the Plant Cell Biology Research Centre from 1982-1999. She is a former chairman of the Commonwealth Scientific and Industrial Research Organisation (CSIRO, 1991–1996), and a former Lieutenant Governor of Victoria (1997–2000). Clarke has been Chancellor of La Trobe University since 2011.