Identify some of the common trees and shrubs in the Chicago area after the leaves have fallen. You will learn the different features of twigs, buds, leaf scars, bark, and growth habit. After the indoor presentation, we will take a walk in the McDonald Woods to solve the mystery of identifying trees and shrubs in the winter. Dress for the weather.. Jim Jabcon, assistant ecologist, Chicago Botanic Garden. Learning Center, Classroom 2