Populus angustifolia, commonly known as the narrowleaf cottonwood, is a deciduous tree native to the western United States. It typically grows in riparian zones, thriving near rivers and streams. This tree can reach heights of 50 to 80 feet and is characterized by its slender, elongated leaves that can be up to 4 inches long. The bark of the narrowleaf cottonwood is smooth and grayish when young, becoming furrowed and darker with age. It plays a vital role in its ecosystem, providing habitat and food for various wildlife species. Additionally, Populus angustifolia is often used for erosion control along waterways.