There are two main groups of trees -- coniferous trees and flowering trees. Coniferous trees generally produce seeds in cones, have needle-like leaves and are evergreen. In contrast, flowering trees generally produce seed in fruits, have broad leaves (like maples) and are dediduos (leafless part of the year). In cove forests, most trees are deciduous. Some cove forests are relatively young because they are secondary growth; old-growth forests are rare in the eastern US.