The Exclamation London planetree (Platanus x acerifolia 'Morton Circle') is a deciduous tree that is commonly used as a shade tree and as an ornamental tree in landscapes. It is a cultivar of the London planetree and can grow up to 60 to 80 feet (18 to 24 meters) tall and 40 to 60 feet (12 to 18 meters) wide.
The tree has a broadly pyramidal shape when young, but develops a more rounded and spreading canopy as it matures. It produces small, greenish-yellow flowers in the spring that are not showy. The tree's most striking feature is its bark, which is a mottled pattern of creamy white, light gray, and brown that peels to reveal a smooth, lighter bark beneath.
The Exclamation London planetree is known for its resistance to anthracnose, a disease that can affect other London planetree cultivars. It is also relatively tolerant of air pollution and other environmental stresses, making it a popular choice for urban areas.
It's important to note that the size of the tree can be influenced by various factors such as soil conditions, climate, and pruning practices. So, the actual height and spread of the Exclamation London planetree may vary depending on the specific conditions in which it is grown.