American Elm
Ulmus americana

Height: 50-80´
Habit: rounded

Landscape Value:

The American elm was one of the most popular and widely used street trees in America until the Dutch elm disease wiped out vast numbers of the species beginning in 1927. The disease still remains, and although it may be held at bay with vigorous spray treatment, there is no guarantee that a homeowner could succeed in preventing the disease for a long period. Other diseases commonly infect the american elm, making cultivation all the more difficult. The tree's are easily transplanted and tolerant of most soil conditions. The vase-shape formed an arch over the street when both sides were planted, leading to its popularity as a street tree.

Seasonal Characteristics:

• Summer: Its large size and high limbs make the American elm a wonderful shade tree where there is adequate space.
  
  
• Fall: Fall color is yellow and variable, from very good to inconsequential.

Points of Interest:

There are three forms of the American elm. The vase-shaped is the most commonly known street tree form. There is also the "oak-form" which has wider spreading branches and a rounder shape; the third is a narrow form. Urbana was once called the "city of elms" and the University of Illinois campus, including the Quad, was once planted with numerous specimens. They are now all gone. Research for a suitable substitute for this tree is an ongoing process but, many feel that there will never be a true substitute found for the stately American elm. Clones of new hybrids thought to be Dutch elm disease-resistant are being tested in the University of Illinois Arboretum.

Native:

Illinois, northeast and northern states of Midwestern U.S.

American Elm Link