1. Distribution of origin 1. Ginkgo trees are widely distributed, mainly in China, Japan, North Korea, South Korea, Canada, New Zealand, Australia, the United States, France, Russia and other countries.

2. China is mainly distributed in Shandong, Zhejiang, Jiangxi, Anhui, Guangxi, Hubei, Sichuan, Jiangsu, Guizhou and other provinces.

second, the origin environment 1. Ginkgo trees like humid, well-drained and deep soil environments, and are suitable for growing in subtropical monsoon areas.

2. It grows best in neutral or slightly acidic soil. It is resistant to stagnant water but drought. The plant grows slowly at the initial stage, and the female plant begins to bear fruit in about 2 years.

3. Common varieties 1. Dongting Emperor: The seeds are round and plump, with an average weight of 3.53 grams, which is the largest kind of ginkgo seeds in Dongting Mountain.

2. bergamot: the seeds are oblong in appearance, with an average weight of 2.6 grams, mainly produced in Suzhou, Jiangsu.

3. Ginkgo biloba L.: The seed shape is oblate, the top of the seed is plump, and the nucleus is broadly ovoid oblate, which is produced in Dongting Mountain, Suzhou, Jiangsu.

4. Jatropha curcas: Its seeds are relatively large, with oblate shape, round core, wide base and fishtail bottom, and it is produced in Xing 'an, Guangxi.