This species has been devastated in its natural range by DED, and even before the advent of the pathogen, never really thrived in north-west Europe. Now of interest in breeding programmes developing DED-resistant cultivars. Introduced to Europe in 1752.
Native to eastern North America.
Monoecious. Wind-pollinated. Wind-dispersed.
Tall (35m), buds ovoid, leaves with little down and broadest above the middle, slightly asymmetrical at base, samaras with deep notch to seed.
The cultivar Ulmus americana 'Princeton' was once marketed as moderately resistant to DED, but it soon proved undeterred by the Larger Elm Bark Beetle (Scolytus scolytus), which is absent from North America. However, other promising disease-resistant cultivars are emerging, including 'Valley Forge'.
No notable associations where introduced.
Highly susceptible to DED. In North America, Elm Yellows is another serious pathogen.
Ornamental.