The Ulmus parvifolia “Sempervirens,” with its gracefully weeping branches, is commonly called the weeping Chinese elm or weeping lacebark elm tree.

Roots also can cause problems. Chinese elm (Ulmus parvifolia): A fast-growing tree, it can tower 40 to 60 feet tall and spreads 50 to 70 feet. It has orange or green peeling bark.

An increasing pollen count during the fall pollen bloom may correspond with a growing presence of Ulmus parvifolia or Chinese Elm trees, according to a study focused on changing pollen trends in ...