Why didn't I think of this last month during Pride?

Because I saw it on the Bing homepage this morning, although I think I have heard of it before.

Eucalyptus deglupta is a tall tree, commonly known as the rainbow eucalyptus, Mindanao gum, or rainbow gum. It is the only Eucalyptus species found naturally in the Northern Hemisphere. Its natural distribution spans New Britain, New Guinea, Seram, Sulawesi and Mindanao.

The unique multi-hued bark is the most distinctive feature of the tree. Patches of outer bark are shed annually at different times, showing a bright green inner bark. This then darkens and matures to give blue, purple, orange and then maroon tones.

And before you ask, it is widely cultivated but cannot survive frosts. So only tropical and subtropical folks can enjoy them in their yard.