A Black Hawthorn (Crataegus douglasii) is a thorny, deciduous shrub or small tree native to western North America, known for its fragrant white spring flowers, sharp thorns, and edible, dark purple-black berries (haws) that are important for wildlife and have historical uses by Native Americans, providing food and materials. It's a hardy plant, often found near streams and forests, valued in landscaping for erosion control and habitat creation.