Platanus racemosa is a species of sycamore tree known by several common names, including California sycamore, Western sycamore, California plane tree, and in Spanish Aliso. Platanus racemosa is native to California and Baja California, where it grows in riparian areas, canyons, floodplains, at springs and seeps, and along streams and rivers in several types of habitats.

Many small birds feed on its fruit, and several mammals eat its twigs and bark. The pollen and hairs on leaves and flowers can be allergens for some people.

Source: Wikipedia