In 1788, Governor Phillip named this area Carmarthen Hills and Landsdowne Hills, but when he saw the distinctive blue coloring of the mountains, the name was changed. The Blue Mountains get their name from the millions of Eucalyptus trees that envelope the area in a beautiful blue mist.
Eucalyptus deglupta is a tall tree, commonly known as the Rainbow Eucalyptus, the Mindanao Gum, or the Rainbow Gum. It is the only Eucalyptus species found naturally in the Northern Hemisphere. Its natural distribution spans New Britain, New Guinea, Ceram, Sulawesi and Mindanao.