Add Yahoo as a preferred source to see more of our stories on Google. James Randklev / Getty Images Rainbow eucalyptus (Eucalyptus deglupta) has been called one of the most colorful trees in the world ...

The blue-green foliage of eucalyptus is a favorite among florists and adds gorgeous texture to gardens.

Trees are amazing organisms, providing shelter, shade and fruit-- and even communicating with each other via fungi. The bark of certain trees can even bear colours of the rainbow, as seen in the ...