Dr. Dean Nicolle, is an Australian botanist, arborist and ecologist. He is widely recognised as the leading authority on the genus Eucalyptus. He has written five books on Eucalypts, including Field Guides to the Eucalypts of South Australia, Victoria and Tasmania. He founded the Currency Creek Arboretum in South Australia where over 900 Eucalypt taxa are grown. Dean has a PhD in mallees.