Winter is a perfect time to focus on trees that don’t lose their leaves. After all the deciduous trees have lost their leaves the evergreens stand out. Evergreen trees and shrubs have some great adaptations for the cold, and many of them reproduce with cones, which is fascinating. Evergreens are not just conifers or pine trees though. Just learning the differences will teach you and your students a great deal about the diversity and variations within the plant world.