Salix Lasiolepis, commonly known as Arroyo Willow, is a species of willow tree native to California. It is a popular ornamental plant with a fast-growing rate and strong ability to adapt to any environment. While the plant is commonly known as Arroyo Willow, it has several other synonyms. These include the California Willow, Western Willow, and the Riverbank Willow. The plant's scientific name comes from the Latin word Salix, which means "willow," and Lasiolepis, which means "hairy scales." The willow tree has several uses and is often used for erosion control, habitat creation, and shade.