Swamp Cottonwood - Populus heterophylla
With a spotty distribution, this is a cottonwood of wet areas on clay soils that are too moist for other cottonwoods. Never common, it is a short-lived, fast-growing tree that may reach 100 feet in height. The branches are upright and the crown somewhat irregular. The bark of old trees is thick and dark brown and broken into plates. The leaves are nearly as wide as long, pointed, and toothed; they are dull green above and somewhat downy beneath. Male catkins are short, the female somewhat longer with a few fruits. Swamp Cottonwood wood is used for small products.