I won't share the bulk of my photos because then why would you go? But, I will show you my favorite photo in the exhibit. It is of this awesome blue wall and collection of garden junk in a backyard garden in Wicker Park. I forgot to make note of the photographer and gardener, sorry.
Visit the exhibit and explore the history of Chicago's gardens, both public and private and see other artwork inspired by nature. Chicago Gardens: Past and Present is open from 10AM-6PM until August 16th. It is located at the Chicago Tourism Center, 72 E. Randolph Street, across from the Chicago Cultural Center and admission is free.
I left a message on the tree. Let me know if you find it.