Ginkgo biloba first appeared in the Carboniferous period 345 million years ago. Ginkgo biloba was widely distributed in Europe, Asia and America in the northern hemisphere, widely distributed in the northern hemisphere in Mesozoic and Jurassic, and began to decline in the late Cretaceous. Until 500,000 years ago, the Quaternary glacial movement occurred and the earth suddenly became cold. Most ginkgo plants are on the verge of extinction. They are extinct in most parts of Europe, North America and Asia. Only China has superior natural conditions, which have been miraculously preserved. Therefore, scientists call them "living fossils" and "pandas in the plant kingdom". There are still wild Ginkgo biloba remains in the mountainous area of western Zhejiang in Linyi (Tancheng County) in the south of Shandong Province in China and in the north of Xuzhou City in Jiangsu Province. There are wild and semi-wild ginkgo communities in Tianmu Mountain in Zhejiang, Dabie Mountain in Hubei and Shennongjia. Due to the scarcity of individuals and dioecious plants, the remaining forests will be replaced if natural regeneration is not strictly protected and promoted. Ginkgo biloba distribution mostly belongs to artificial cultivation areas, mainly cultivated in China, French and South Carolina. There is no doubt that foreign Ginkgo biloba was introduced directly or indirectly from China.

Morphological characteristics: Ginkgo biloba is a deciduous tree with grayish brown bark and deep longitudinal crack. The crown is wide and oval, and the branches are divided into long branches and short branches. One-year-old branches are light brown, then grayish white, with fine longitudinal cracks, and short branches are densely covered with leaves. The leaves are fan-shaped, the veins are bifurcated, and the top is usually 2-lobed. Alternate on long branches, clustered on short branches. Dioecious, the seeds are drupe-shaped, ovoid, pale yellow or orange when mature, and the leaves are covered with white powder. The flowering period is April-May, and the seeds mature in September-65438+1October.

Ginkgo trees are tall and straight with fan-shaped leaves. The canopy is large and cool, which has a cooling effect. The leaves are quaint and have a long life. No pests and diseases, no pollution to the environment, smooth trunk, is a famous pollution-free tree species, which is conducive to the reproduction of Ginkgo biloba and add scenery. Strong adaptability, Ginkgo biloba has extensive requirements for climate and soil. Smoke and dust resistance, fire prevention and toxic gas resistance. Ginkgo tree is tall and straight, graceful, green in spring and summer and golden in late autumn. It is an ideal tree species for landscaping and roadside. It can be used as an ideal cultivated tree species for landscaping, roads, highways, field forest nets and windbreaks. It is listed as one of the four long-lived ornamental tree species (pine, cypress, Sophora japonica and Ginkgo biloba) in China.

China is not only the hometown of Ginkgo biloba, but also one of the countries and regions with the earliest cultivation, utilization and research and the richest achievements. Throughout the ages, China ranks first in the world in terms of ginkgo planting area and ginkgo output. Judging from the age of the existing ancient ginkgo trees, ginkgo was planted between Shang and Zhou Dynasties in China.

Ginkgo biloba is a unique and rich economic plant resource in China. The seed coat can be extracted with tannin extract. The wood is light yellow, thin, light and soft, and is used in architecture, furniture, sculpture and other handicrafts. Garden trees and street trees. Seeds contain hydrocyanic acid, histamine acid, protein, etc.

artistic value

Ginkgo biloba is magnificent, its trunk is winding and lush. In the famous mountains and rivers and ancient temples in China, there are tall and straight ancient ginkgo biloba. They go through vicissitudes, trace back to ancient and modern times, and give people a sense of mystery. Poets and poets of past dynasties set foot in temples and left many poems and songs, proud of their beautiful scenery and merits. Ginkgo biloba with graceful posture is selected and processed into bonsai, and the majestic posture of Ginkgo biloba in nature is concentrated in the basin. It is elegant and interesting, and it is clear to the desk, which makes people feel happy.

Ginkgo biloba is a famous long-lived tree species, with strong vitality, peculiar leaf shape and easy grafting, reproduction and pruning. It is a high-quality material for making bonsai. Ginkgo bonsai made of ginkgo milk is a must, with high ornamental value and economic value. Ginkgo biloba is a common tree species in bonsai in China. Ginkgo bonsai has become a must among China bonsai because of its thick stems, bent branches, exposed roots, unique shape, vigorous and unique taste. Summer is lush, and autumn is golden, giving people a feeling of precipitousness, grandeur and elegance. In recent years, people pay more and more attention to it, and it is known as "living art sculpture". According to people's different appreciation requirements, there are mainly ornamental bonsai, foliage bonsai and stump bonsai ... for medical purposes.

It has special effects on skin whitening and wrinkle removal.

1. Whitening: When the body is in poor health, our endocrine is prone to disorder and imbalance. At this time, there are too many oxygen free radicals and insufficient superoxide dismutase (SOD) in the body, which leads to the oxidation reaction between too many oxygen free radicals and dermal cells, forming a large number of lipofuscin (lipid peroxide), resulting in chloasma or pregnancy spots. Flavonoids contained in Ginkgo biloba leaves can hinder the formation and deposition of pigments in the dermis, thus whitening the skin and preventing pigmentation. Besides flavonoids, trace elements such as manganese and molybdenum in Ginkgo biloba leaves can also scavenge oxygen free radicals and inhibit the growth of melanin.

2. Wrinkle removal: It takes about 3 months for human skin to be completely renewed, but why do we still have annoying fine lines on our faces? The reason is that the newborn cells formed in the dermis have been oxidized by too many free radicals before reaching the skin surface, and they are already aging cells when they reach the epidermis. Flavonoids glycosides and flavonols in Ginkgo biloba leaves are free radical scavengers, which can protect dermal cells, improve blood circulation and prevent cells from being oxidized to produce wrinkles.

Matters needing attention

Ginkgo biloba can't make tea with tea and chrysanthemum.

Ginkgo biloba contains a lot of ginkgolic acid, which is toxic. Generally, the leaves bought are not extracted by deep processing, and the ginkgolic acid content in them is as high as 3000-4000ppm. In particular, ginkgolic acid is water-soluble. Instead of eating the effective substances such as ginkgo brass and ginkgolic acid, the effect is the opposite, and it is full of poison!