Elm Tree Variety:Cedar Elm especially before it establishes itself Quercus Bicolor Swamp White especially before it establishes itself after planting Bring the wildlife to your landscape Another useful multipurpose tree is the slippery elm (Ulmus rubra)‚ which grows to a height of 60 feet with a broad‚ open crown․ It has a stout dark bark․ These trees are easily identifiable and recognizable by hikers and walkers in the park․ The inner bark of the tree has been used in herbal medicine since antiquity for its demulcent properties․ The leaves are serrated and dark green‚ contrasting with the rough exterior of the bark․ The flowers are small and inconspicuous‚ clustered in groups during the spring months․ Slippery elm thrives in moist‚ fertile‚ well drained soil and attracts a variety of wildlife․ The seeds are eaten by many birds and the tree is hardy․ It makes a fine ornamental and useful tree for its flowers‚ seeds and wildlife value․ Being the most widely distributed tree in North America‚ the American elm‚ Ulmus americana‚ with its great sweeping arches of branching‚ was a very common sight in America's culture and use‚ lining avenues in city streets and all around the towns of North America․ They reach a height of 100 ft (30 m)