description
Ulmus rubra, commonly known as slippery elm, is a deciduous tree of the Ulmaceae family.
The slippery elm tree can grow to 65 feet (20 m) in height with its
trunk gaining a diameter of 20 inches (50 cm). Slippery elm differs from the American elm in a number of ways. Slippery elm
has a more upright branching pattern. The tree can
also be distinguished from the American elm by the hairiness of its buds and twigs; American elm buds and twigs are smooth.
Slippery elm trees also have very short-stalked flowers.
The tree's roughly textured leaves are 4-6 inches (10–18 cm) in length and have coarsely double-serrate margins, acuminate apices and
oblique bases.
The flowers are perfect, apetalous, and wind-pollinated. They are produced
prior to the leaves in early spring, usually clustering in groups of 10–20. The tree's fruit
is an oval winged samara that contains a single,
central seed; the samara is about 3/4 inches (20 mm) in length.
common names & nomenclature
The common name slippery elm is an allusion to the tree's mucilaginous inner bark. Additionally the color of the trees
heartwood is reddish-brown, giving the tree its alternative common name Red
Elm.
Also known as:
red elm, gray elm, soft elm, moose elm, indian elm, slippery elm