Perennial tree. Native to North America. The fresh inner bark makes a good survival food. Native Americans used this bark in the treatment of hemorrhoids and tumors. Well known for its soothing effect on the digestive tract due to its mucilaginous nature. The population of Slippery Elm Trees is dwindling due to Dutch Elm Disease and over-harvesting for the herbal industry. It is an act of conservation to plant these graceful trees in our herb gardens. Hardy to zones 3-7.