Family: Ulmaceae, elm family
Genus, species: Ulmus rubra
Base of leaf is asymmetrical. Edge of leaf is coarsely double-toothed. Leaf texture is usually rough, like sandpaper.
Bark is soft, spongy, often colonized by moss.
Flowers are short-stalked, arranged in clusters of 10 to 20, appear before leaves in spring.
Fruit is a thin and smooth papery wing, elliptical, contains one seed in center.
The common name, "slippery elm," refers to the tree's slimy inner bark. The genus name Ulmus is from the Latin for "elm." The species name rubra is from the Latin for "red," referring to tree's reddish-brown heartwood.