Balsam Cottonwood - Populus balsamifera
One of the most northerly broad-leafed trees on the continent, Balsam Poplar is more robust in Alaska than it is in the more southerly parts of its range. A medium-sized tree, it prefers deep, moist soils alongside streams and other moist places such as swamp and lake borders. It is a pioneering species and can form pure stands in open sites. The trees have a tall, straight trunk, a narrow, open crown and thickened bark on older specimens. The sharply tipped leaves are broad near the base, and toothed. The female and male catkins are separate, and the fruits are tapered capsules.