London Plane is an introduced hybrid tree widely planted in London streets and squares. It is a cross between two parent species - the Oriental plane (Iranian Chenar) and the Occidental plane (American Sycamore) - both imported to Britain as ornamental trees.
The London plane is very tolerant of atmospheric pollution and root compaction, and for this reason it is a popular urban roadside tree. Many were planted 200 years ago and are still growing vigorously in London.