|Ulmus rubra is a medium-tall native elm, growing 40 to 60 feet tall. Growth habit is somewhat vase-shaped. This species can become a weed, taking over vacant ground, unmaintained sites. Prefers rich, moist, soil, but adaptable to dry, limey soils as well. The name "Slippery Elm" was derived from the slimy, mucilaginous inner bark used in the herb trade. Unfortunately it is subject to Dutch Elm Disease. Native from Quebec to Florida, west to Texas.