The Oriental plane (Platanus orientalis) belongs to Platanaceae (the Plane-tree family). It is a tall deciduous tree that is native to the Eurasia from the Balkans to at least as far east as Iran. It was introduced into Japan in the days of Meiji Era (about 125 years ago). This tree grows naturally in riverine, together with such trees as alder, willow and poplar, and it can reach about 30 m in height. The leaves are alternate, deeply lobed, and palmate. The bark is usually flaking, occasionally not flaking and becoming thick and rugged. The flowers and fruit are round and bur-like, borne in clusters of between 2 and 6 on a stem.