The American elm is known for its tough wood, which was used in the past to make wagon wheels. American Elm Leaves - Photo by Paul Wray, Iowa State University. With its majestic, vase-shaped form accentuated by long, drooping branches, American elm is one of New England's most beautiful trees and was once a ubiquitous and monumental street tree in most towns. american elm leaf; ironwood leaf; If you see a papery bladder that looks a little like a soft pine cone hanging by the leaves, then you know the tree is an ironwood. USDA introduction. Types Of Elm Trees 1. It forms the traditional vase shape, to 70' tall and 50' wide with yellow fall color. It is actually an older clone developed before the advent of DED in the United States. Developed at the Morton Arboretum, this hybrid clone has shown good Dutch Elm disease resistance, elm leaf beetle and elm leaf miner resistance. Ulmus americana: American Elm 2 Foliage Leaf arrangement: alternate Leaf type: simple Leaf margin: double serrate Leaf shape: oblong, ovate Leaf venation: pinnate Leaf type and persistence: deciduous Leaf blade length: 1 to 5 inches Leaf color: green and smooth to slightly scabrous on top, lighter green and pubescence underneath The leaves of American elm are alternate in arrangement, oval, sharp pointed with double-toothed margins, and have prominent midrib and lateral veins. The base of elm leaves have an asymmetrical shape. The twigs are slender, reddish-brown turning as gray with age, hairy at first and smooth later. Excellent resistance to Dutch elm disease and elm yellows, but can be susceptible to elm leaf beetle. 'Valley Forge' - A U.S. National Arboretum introduction, this plant is probably the best choice for installation in … The American elm is a small to medium-sized (to very large) tree, at maturity with spreading branches forming a broad-spreading, fan-shaped crown. Look at the bark to verify that the shape is of an American Elm tree. The apex of these leaves, on the other hand, is acuminate. In order to identify an elm leaf, one should check whether it is 4 to 6 inches in length; the width has to be 1 to 3 inches. The ironwood leaf also has veins that branch out near the edge of the leaf. Leaves of the elm have a single/double serrated margin. American Elm Tree. American Elms used to line the sidewalks before Dutch Elm disease. The branches just start closer to the ground. American Elm (Ulmus americana), once a stately and magnificent tree that lined America's city streets, has partly followed in the footsteps of the American Chestnut, with many large American Elms succumbing to Dutch Elm disease.This pathogen (transmitted by the elm bark beetle) plugs the vascular system of the tree, preventing the flow of water and nutrients and slowly killing it. Best used as street tree. 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