Which tree species is commonly called the rainbow eucalyptus because of its multicoloured bark?

Eucalyptus deglupta is commonly called the rainbow eucalyptus because of its multicoloured bark.

As the outer bark peels away at different times, the newly exposed inner bark changes from bright green to blue, purple, orange, and maroon before becoming brown. The colors result from changing pigments and oxidation as the bark matures, rather than from painted or naturally striped wood.

This species is native to the Philippines, Indonesia, and New Guinea. It is unusual among eucalyptus trees because it naturally grows in tropical rainforest environments and can tolerate wetter conditions than many familiar Australian eucalypts.

Rainbow eucalyptus is planted ornamentally in warm climates, including parts of Hawaii and the southern United States. Its appearance varies with age, climate, and growing conditions, so not every cultivated tree displays equally vivid colors.