Chestnut.

Fagaceae chestnuts are deciduous trees. Native plants are found in Asia, Europe, the Americas and Africa in the northern hemisphere. The main cultivated species are C.sativa and C.crenata.

is one of the earliest fruit trees cultivated in China. The Book of Poems records that there is about 2000 to 3000 years of cultivation history. A needle-shaped or long circle with jagged edges. Flower monosexual, male and female, male flowers for □ flower sequence, male 10 to 20 pieces, May flowering, flowering period of 1 month, wind-borne pollination, female flowers grow at the top of the resulting branch of the male flower sequence of the base. Usually 3 sub-rooms are born in 1 total, with a total of needles. When ripe, it always cracks and the chestnuts fall off. Nuts are purple-brown, tawny hair, or nearly smooth, and the flesh is pale yellow.China's chestnut varieties can be divided into northern chestnuts and southern chestnuts two categories: northern chestnut nuts are small, fruity, good quality, suitable for fried food, famous varieties have "ming chestnut", "spire chestnut", "ming-picking chestnut" and so on. Southern chestnut nuts are larger, the flesh is partial, suitable for vegetable use, there are "nine species", "quid chestnut", "light thorn chestnut" and so on. Trees are strong. The root system is developed and the bacterial roots are symblosis. More drought-resistant, barren and thin, suitable for mountain cultivation. Suitable for acidic soils. Multiple lines of live seeding, can also be grafted and reproduced. Flowering results in 3 to 4 years after planting. Ten years later, it's in full bloom. The fruit contains 62 to 70% sugar and starch, and contains
protein
, fat and a variety of
vitamins
(A, B1, B2, C), minerals and so on. Wood is dense, hard and resistant to moisture. Branches, barks, and total slugs contain chanine, which can be extractedglue. Chinese chestnut nuts are of high quality and disease resistance, and are used in Japan, Europe and the United States to improve the breeding parenting of local chestnuts.