Alnus rubra, commonly known as red alder, is a deciduous tree native to the western regions of North America. It typically grows in moist, well-drained soils along riverbanks and coastal areas. The tree can reach heights of 50 to 100 feet and is characterized by its smooth, gray bark and serrated, oval leaves. Red alder plays a vital role in its ecosystem by fixing nitrogen in the soil, which benefits surrounding plants. Its wood is lightweight and durable, making it popular for furniture and cabinetry. Additionally, Alnus rubra provides habitat and food for various wildlife species.