The Vitis amurensis Ruprecht is a deciduous vine plant of the grape family. Also called "mountain grapes," this vine grows autogenously in forests teeming at the foot of mountains or between valleys at high altitudes of 100 to 1,650 meters above sea level. It can be found throughout Japan, China and Korea. Blossoming many small, yellow-green flowers around June, it has tendrils that grow beneath flower spikes and could stretch as long as 10 meters. With grains at 8 mm in diameter, clustered grains dangle downward. Its grains turn into luscious, dark purple color when fully ripened around September. Two to three grape seeds are formed in each of the grain. Its fruit can be eaten raw or processed to make alcoholic beverages. The tree may be planted either as an ornamental garden plant or for harvesting fruits. Some species of this wild grape have red-brownish hairs on the backside of the leaves, while others have densely formed red-brownish hairs that fall off easily.