Please let me know what kind of tree it is?
Hello, thank you for contacting the Toronto Master Gardeners for help identifying this tree. It is very difficult to make a definite identification. One needs to look at several characteristics throughout the growing season to be sure, such as the bark, leaf buds, keys (samara) and fall colour. Your photo suggests a Maple leaf shape, but it has rounded lobes (different from other typical Maples) so this leads me to believe it is a Hedge or Field Maple Acer Campestre. This is a small sized Maple, often suggested for smaller parks and urban gardens. It has a short trunk and a tidy rounded shape. Because of its multi-stemmed habit it resembles a large shrub rather than a tree, hence its common name: Hedge Maple. Acer Campestre is a tough tree, and is tolerant of many difficult conditions such as pollution, salt and drought. I am surprised we don’t see more of them around. To confirm this identification look out for a deeply furrowed bark (in mature trees), bright yellow fall colour, and its distinctive keys (Samara). I have included links that contain good photographs of these Samara as well as more information about this tree.