Thuja plicata is a species of coniferous tree in the Cupressaceae family, native to western North America. It is commonly known as western red cedar and is one of the most valuable trees in the Pacific Northwest. The tree has a conical shape with a broad base and a narrow, pointed top. Its leaves are scale-like and arranged in opposite pairs along the twigs. The cones are small and brown, and the bark is fibrous and reddish-brown.