The third of the trees planted along the driveway is a Box Elder Maple.
Acer negundo is a species of maple native to North America. Box Elder, Boxelder Maple, and Maple Ash are its most common names in the United States. Other variant names — some of which are regional – include Ash Maple, Ash-leaf Maple, Black Ash, California Boxelder, Cutleaf Maple, Cut-leaved Maple, Negundo Maple, Red River Maple, Stinking Ash, Sugar Ash, Three-leaved Maple, and Western Boxelder. In Canada it is commonly known as Manitoba Maple and occasionally as Elf Maple. In Russia it is called American Maple (Russian: американский клён).