The 13th Annual Trees in the Urban Landscape Symposium will take place this year on Thursday, November 18, from 9 – 4 at Tower Hill Botanic Garden in Boylston, Massachusetts.  The theme for 2010 is Diversity in the Urban Landscape: A Planned Invasion.  Keynote Speaker will be Peter del Tredici, Senior Research Scientist, Arnold Arboretum.  The Symposium is co-sponsored by Tower Hill and by the Nathaniel Wheeler Trust/Bank of America.  For complete details, call 508-869-6111, ext. 124.  The complete schedule will be published soon at www.towerhillbg.org.