There are words such as "Huaimen" and "Huaiting" in Chinese, but they come from the national tree. In Zhou Li during the Spring and Autumn Period, it was said that the Zhou Dynasty's Taishi, Taifu and Taibao were sitting under three locust trees. Since then, Sophora japonica has been associated with the Prime Minister. At that time, Sophora japonica had not yet come to China.
It seems that Sophora japonica is very different from Sophora japonica.
First of all, they come from different backgrounds. They are somewhat similar in appearance, both tall trees and butterfly-shaped flowers, but Sophora japonica originated in northern China, especially in the Loess Plateau and North China Plain. Robinia pseudoacacia originated in North America and was not introduced to China until 1877.
Second, the flowering period is different. Sophora japonica blooms in July-August, milky white, tasteless, with drooping racemes, and now it is just then. Sophora japonica blooms from April to May, some are white and some are purple, which is very fragrant. The raceme rises and the flowers are bigger. It must be remembered that what we usually eat and make us unforgettable is acacia flowers. You can also make honey. Sophora japonica is used as medicine, and its flower is called Sophora japonica seed.
Third, the shapes of leaves are different. The tips of Sophora japonica are thinner. Robinia pseudoacacia is rounder and more blessed.
Fourth, the fruit is different. Sophora japonica is a rosary, yellow and green. Robinia pseudoacacia is flat, like beans, dark brown and easy to crack.
Sophora japonica can also lower blood pressure, dilate coronary artery, resist oxidation, stop bleeding and treat food. In the era of material scarcity, Sophora japonica leaves are "life-saving food".
It's really "when you plant locusts in front of your door, wealth will come naturally."