21 American Elm

American Elm, Ulmus Americana

This large beautiful stately tree once graced many streets throughout Colorado and the country until Dutch Elm disease created havoc over the past 60 years. Good sanitation practices are important because of the large number of insects and disease that can affect this tree. American elms can grow very large to a height of up to 70 feet with a large spreading canopy and a beautiful yellow fall color.