Green broad bean is a very rare broad bean variety with white skin and green heart. It grows in Baoshan, Yunnan. The special geographical climate makes its vitamin and nutrient content higher than that of ordinary broad bean, which is known as the characteristic green broad bean in Yunnan Plateau.

Yellow-skinned broad bean is a common broad bean in the market.

Broad bean is one of the oldest edible legume crops cultivated by human beings, which originated from the western plateau of Iran to North Africa.

Broad bean has a long history of cultivation and was domesticated in the eastern Mediterranean, and its archaeological evidence can be traced back to 10 century. Although broad bean is a widely planted crop, its origin is very complicated. Some people think that broad beans spread to Anatolia through Mesopotamia, Mediterranean countries and China, and then to Europe.

Broad bean was introduced into China in 1 century, and has been planted for more than 2000 years. The earliest record of broad bean is that the word "bean" appeared in Guangya in the Three Kingdoms period, and it was also unearthed in the Neolithic site in Qianshanyang, Xing Wu County, Zhejiang Province. Li Shizhen said, "Beans are like old silkworms, hence the name". Broad beans are planted in most provinces of China, with spring sowing in the north of the Yangtze River and autumn sowing in the south of the Yangtze River. Broad bean cultivation in China is mainly distributed in the southwest, the Yangtze River valley and the northwest, covering an area of about 6.5438+0.4 million mu, while there are more than 4 million mu of fresh-sold broad beans in Yunnan and the eastern coastal areas.