The ultimate fall colour tree is Liquidambar styaciflua! Or Sweet Gum. This tree is so cool! The trunk gets quite corky with age which adds interest even in winter. The leaves resemble maples, but are much more deeply cut. Shiny green leaves emerge later in spring and start turning in the late summer into wonderful shades of red, orange, purple and even black! The tree is tall and slender, it is incredibly striking in any setting.