This guide is based on the Fall Foliage Tree Walk of Washington Square Park organized by WSP Ecology and led by Leslie Day, PhD on November 14, 2014. Unless otherwise noted, the tree photographs were taken by Hubert J. Steed from his Trees - Washington Square Park gallery and used with his permission. If you visit the Washington Square Park before the end of the month you may be able to use this guide, otherwise you'll have to wait until next fall. Also, N ot every tree visited during the actual tour is recorded below. Image: English elm, March 31, 2011 (Local Ecologist) Begin your walk at the historic English elm at the northwest corner of the park. The tree is reportedly over 300 years old. Image: London plane tree diagonally across from the Holley Monument Proceed east and look north along the path to a London plane. The species is the most common street tree in NYC and its leaf looks suspiciously like the NYC Parks logo. Image: A type of white oak (