The Slippery Elm (Ulmus rubra) is a species of elm native to eastern North America (from southeast North Dakota, east to southern Quebec, south to northernmost Floria, and west to eastern Texas). It is similar to American Elm in general appearance, but more closely related to the European Wych Elm, which has a very similar flower structure. It is less susceptible to Dutch elm disease than other elms and has a different branching pattern. Its heartwood is reddish-brown, giving the tree the name, Red Elm. Other names include Gray Elm, Soft Elm, Moose Elm and Indian Elm.