It [Corymbia citriodora] has smooth, pale, uniform or slightly mottled, white to pink or coppery bark that is shed in thin flakes.- Corymbia citriodora (Wikipedia)
Corymbia citriodora, commonly known as lemon-scented gum and other common names, is a species of tall tree that is endemic to north-eastern Australia. It has smooth white to pink bark, narrow lance-shaped to curved adult leaves, flower buds in groups of three, white flowers and urn-shaped or barrel-shaped fruit.