State Street maple (Acer x freemanii 'Celzam') is a deciduous tree that is commonly used as an ornamental tree in landscapes. It is a hybrid between the red maple and silver maple, and can grow up to 50 to 60 feet (15 to 18 meters) tall and 30 to 40 feet (9 to 12 meters) wide.
The tree has an upright, oval habit with a symmetrical canopy, and produces small, red flowers in the spring that are followed by paired, winged fruit in the fall. Its foliage is a medium, green color throughout the growing season, turning a vibrant, orange-red color in the fall. The State Street maple has a smooth, gray bark when young, which eventually develops some furrows and fissures as the tree matures.
State Street maple is known for its fast growth rate, striking fall color, and adaptability to a range of soil types and environmental conditions. It is also tolerant of urban pollution.