European chestnut + Japanese chestnut

Castanea sativa is a species of deciduous tree with an edible seed. It is commonly called sweet chestnut and marron. Originally native to southeastern Europe and Asia Minor, it is now widely dispersed throughout Europe and in some localities in temperate Asia. The tree is hardy, long-lived and well known for its chestnuts, which are used as an ingredient in cooking.

Japanese Chestnut (Castanea crenata) is a species of chestnut originally native to Japan and South Korea. It is a small to medium-sized deciduous tree growing to 10-15 m tall. The leaves are similar to those of the Sweet Chestnut, though usually a little smaller, 8-19 cm long and 3-5 cm broad. The flowers of both sexes are borne in 7-20 cm long, upright catkins, the male flowers in the upper part and female flowers in the lower part. They appear in summer, and by autumn, the female flowers develop into spiny cupules containing 3-7 brownish nuts that are shed during October.