Nuts are mature ovaries of flowering plants or angiosperms. Traditionally, people generally refer to many plant seeds wrapped in hard shells as nuts. Such as peanuts, melon seeds, almonds, walnuts and so on. Specifically, there are the following kinds of nuts: \x0d\1.Pines \ x0d \ They are familiar gymnosperms. Evergreen leaves are lanceolate and clustered on short branches; Distributed in most temperate zones and their northern regions. Mature pine cones contain seeds, which can be eaten raw, but baked will be more fragrant and easy to store. Young pinecones can also be eaten after boiling. Young leaves and bark can also be eaten. \x0d\ 2. Walnut \ x0d \ is 30m high, with opposite compound leaves, long and narrow leaflets, multiple teeth and wrinkled bark. Mature nuts are brown with a thick green shell. Distributed in temperate regions. Each kilogram of walnut fruit contains 6600 calories, rich in18% protein and 60% fat. \x0d\ 3. Buttered walnut \ x0d \ It is a relative species of another North American walnut tree, with smaller tree shape, darker bark color and thick berry-like shell outside the nut. \x0d\ 4. hickory \ x0d \ tree is more than 30 meters high, with black bark and opposite leaves. Distributed in foggy areas of North America. Oval thin-shell fruit is rich in fat, which is the highest among all plants. \x0d\ 5. Castanea mollissima \ x0d \ is a tall shrub, which is distributed in hillside fields. Ovate to heart-shaped leathery leaves with dentate edges. Brown-yellow shell fruit, rich in nutrition, covered with leafy hairy shell. \x0d\ 6. Beet \ x0d \ is 5-30m high, with large horny leaves, long strips and toothed edges. Distributed in temperate forested areas. 2-3 nuts are gathered together and covered with a spherical thick prickly shell. After mashing, the fruit can be peeled off, boiled and mashed into a paste. Don't confuse it with Ma Li! The latter has large palmate leaves and its nuts are poisonous.