Since the tallest Coast Redwood is about  and the Worlds Largest Blue Gum Eucalyptus on Mattole Road Petrolia CA measures nearly  high  feet around and has a spread of  the coast redwood is more than two times the height of the eucalyptus  I am also not finding reliable sources for the height of the Petrolia tree the best I could find was a Road Side America tip which suggests asking at the Petrolia Store for details of the tree  Also I find in Spain a much taller Blue Gum Eucalyptus with a height of  in Ro Landro Viveiro measured in  as referenced by Monumental Treescom   On the US Forest Service Eucalyptus globulus Labill Bluegum Eucalyptus webpage but referencing a magazine article The trees that captured California Sunset August  I find the following quotation about the Berkeley eucalyptus trees The tallest stand in California is one planted in  on the University of California campus at Berkeley it contains trees that have been more than  m  ft tall since  At present the Berkeley California grove is stated to be  the tallest stand of hardwood trees in North America and the tallest stand of this type of eucalyptus in the world This comes from The University of California Berkeley Strawberry Creek Tour  Eucalyptus Grove I hope this answers your question again welcome to wikipedia