Often shrubby but can be trained to small tree or tree-clump effect. Populus acuminata Waxleaf cottonwood Native. For soils that stay moist. Populus angustifolia Narrowleaf cottonwood Native. Best used where there is soil that stays moist.
Narrow leaves resemble willow.
Populus balsamifera Balsam poplar Native. Foliage handsome, thick-textured. Populus candicans White poplar Native. Foliage nearly heart-shaped. Upper bark a showy, smooth gray.