Walnut is the fruit of walnut. Walnut is a tall tree, which can grow to 25 meters. The shape of the fruit is approximately spherical, with a diameter of 4-6 cm. The surface of the stone is wrinkled, the top is pointed, there are longitudinal edges, and the peel has irregular gaps.

2. Cashew nuts

Cashew nut, also known as chicken cashew nut, is an evergreen tree plant belonging to Ursodaceae. Drupe is kidney-shaped, slightly compressed on both sides, hence the name. It is 2-2.5 cm long, the fruit base is fleshy pear-shaped pseudopod handle, and the mature color of pod is purple.

3. Pistacia vera fruit

Pistachio nuts, the scientific name of which is Pistachio nuts, are small arbor plants with a height of 5-7 meters. Their branchlets are thick cylindrical, covered with gray pilose and have prominent lenticels. The fruit is oblong and thin, and its color is yellow-green or pink when it matures.