Elm and Oak are two types of TREES. Elm TREES are deciduous TREES that are native to Europe, Asia, and North America. They have a vase-shaped crown and can reach heights of up to 130 feet. Oak TREES are also deciduous TREES and are native to the Northern Hemisphere. They have a rounded crown and can reach heights of up to 100 feet. Both elm and oak TREES are popular for their hardwood and are used in furniture making, flooring, and other woodworking projects.