A Washington palm (Washingtonia robusta) is a tall, single-trunked evergreen tree that can grow up to 60 feet tall. The trunk is covered with rough, brownish-gray bark and the leaves are long, green and palmate (fan-shaped). The flowers are small and white, borne in clusters at the ends of the branches. The fruit is a black drupe about 1/2 inch in diameter. Washington palms are native to desert regions of northwestern Mexico and the southwestern United States (Arizona, California, Nevada and Utah). They are widely cultivated as ornamental trees in warm climates all over the world.