Acer /ˈeɪsər/ is a genus of trees and shrubs commonly known as maple. The genus is placed in the family Sapindaceae. There are approximately 128 species, most of which are native to Asia, with a number also appearing in Europe, northern Africa, and North America. Only one species, Acer laurinum, extends to the Southern Hemisphere. The type species of the genus is the sycamore maple, Acer pseudoplatanus, the most common maple species in Europe. The maples have easily recognizable palmate leaves and distinctive winged fruits. The closest relatives of the maples are the horse chestnuts.