Graceful, elegant American elm trees; photo by Mike Rollinger on Flickr (noncommercial use permitted with attribution / no derivative works).
Official State Tree of North Dakota
North Dakota designated the American elm (Ulmus Americana) as the official state tree in 1947 (American elm is also the state tree of Massachusetts). All State Trees
Common throughout the state of North Dakota, the American elm often reaches 120 feet or taller. Unfortunately, the graceful American elm is vulnerable to a devastating pathogen called Dutch elm disease.