Platanus racemosa is a species of sycamore tree, native to California and Baja California. It is a deciduous tree that can reach up to 30 meters (100 feet) tall and 9 meters (30 feet) wide, with a broad and spreading crown. The bark is light gray and smooth when young, becoming darker and developing thick, irregular ridges with age. The leaves are palmate, with 3-5 lobes, and are up to 20 cm (8 inches) long and wide. The flowers are small and greenish and are produced in dense, hanging clusters in the spring. The fruit is a spherical, spiky ball, up to 3 cm (1 inch) in diameter, containing numerous small seeds.