Enjoy an early evening walk with Mount Auburn Cemetery President & CEO Dave Barnett to observe the ornamental trees and shrubs that show off their flowers in late July. Learn about the many plants available that provide summer beauty and interest. The culture and use of these plants in your home garden will be discussed. Meet at the Entrance Gate at 580 Mount Auburn Street in Cambridge. $7 Friends of Mt. Auburn, $12 general public. Call 617-547-7105 for more information, or visit www.mountauburn.org.