The common walnut (Juglans regia) is a deciduous tree of the family of the walnut family. It grows to 15 - 25 meters high (40-80 feet) in dense spinneys. It stops growing only after 60 to 80 years. It can reach ages of more than 200 years old.
The seeds of the fruits, which show their maturity with a brown and cracked shell are known as walnuts and widely available commercially.