Have you ever wondered why some plants have flowers before they have leaves, while others leaf out before they flower? Looked at flower and leaf buds and asked yourself what protects them as they develop and how they know when it’s OK to open? Arnold Arboretum Director William (Ned) Friedman will lead this walk on Sunday, May 7 from 1 – 2 through the Arboretum, drawing your eye to ephemeral developments in the springtime landscape. He will look at some of the trees observed in our Tree Spotters phenology program, but will also stop to point out other trees and shrubs that show interesting morphological characteristics. Bring a loupe or hand lens if you have one. Fee Free, but registration required. Register at my.arboretum.harvard.edu or call 617-384-5277.