The Xeriscaping symbol was developed by many employees at Denver Water (the water department of Denver, CO), where the term was coined.
The concept of xeriscaping was created for the purpose of minimizing the use of water. Although originally conceived as a response to the drought of 1977 in our western states, it has become popular across the nation. In light of the extreme weather conditions we've been experiencing these past few years, we're all more and more aware of what a precious commodity water is and we're continuing to make changes to preserve and use it wisely.
If you'd like to read more about this topic, Colorado State University Extension is a wonderful place to start.
A fine example of xeriscaping can be found at the
Lurie Garden in Chicago's Millennium Park.