1. Different shape characteristics

Wild chestnut involucre is spherical, with sharp thorns on the outside, 2-3 nuts inside, and splits into 4 petals when mature. Nuts are dark brown, 2 to 75px in diameter. The sharp spines of mature shells are either long or short, sparse or dense. When they are dense, they completely cover the outer wall of the shell, and when they are sparse, the outer wall is visible. The diameter of the shell's spines is 4.5-6.5 cm; the height of the nut is 1.5-3 cm, and the width is 1.8-1.8 cm. 3.5 cm

An improved variety of common chestnut hybrid culture is widely planted in my country because of its large size, sweet taste and strong disease resistance. Chestnut is native to the temperate zone of the northern hemisphere. Most chestnut trees are 20 to 40 meters tall and are deciduous trees. Only a few are shrubs. All kinds of chestnut trees bear edible nuts, which are single leaves, oval or oblong, 10 to 30 cm long and 4 to 10 cm wide, with bristle-like teeth on the edges.

The plant is monoecious, with male flowers in upright catkins and female flowers singly or in several flowers within the involucre. The nuts are enclosed in densely spiky involucres with a diameter of 5 to 11 cm. There are 1 to 7 nuts in one involucre.

2. Different growth dates

The flowering period of wild chestnuts is from April to June, and the fruiting period is from August to October.

The flowering period of ordinary chestnuts is from May to June, and the fruits are ripe. Period September to October

Extended information:

Variety classification

my country has a vast territory and widely varying ecological conditions, forming a large number of chestnut variety resources. No less than 300 chestnut varieties have been named across the country, but they can generally be divided into two major varieties, namely northern chestnut and southern chestnut.

1. Northern Chestnut

Mainly distributed in the Yanshan and Taihang Mountains in North China and their adjacent areas. Including Hebei, Beijing, northern Henan, Shandong, Shaanxi, parts of Gansu and northern Jiangsu. Its characteristics are that the fruit shape is small, and the average weight of a single fruit is about 10 grams; the flesh is waxy, with a sugar content of about 20%; the pulp contains low starch and high protein content; the peel is dark and shiny; it has a strong fragrance and astringent skin. Easy to peel, suitable for stir-frying, called sugar-fried chestnuts.

2. Southern Chestnut

Mainly distributed in Jiangsu, Zhejiang, Anhui, Hubei, Hunan, and southern Henan. In this area, there is high temperature and rain, and the chestnut nuts are large in shape. The average weight of a single kernel is about 15 grams, and the maximum weight can be 25 grams. However, the sugar content is low, the starch content is high, and the meat is japonica-type. They are mostly used as vegetable chestnuts. There are many chestnut varieties in the north and south of my country, and there are differences in the characteristics and characteristics of the southern and northern varieties. Generally, the quality of southern varieties is not as good as that of northern varieties, and the meat is more japonica-like, suitable for stir-fry, and is also called vegetable chestnut.

Reference material comes from: Baidu Encyclopedia - Chestnut