Robinia pseudoacacia (scientific name: Robinia pseudoacacia? L) is a deciduous tree of Leguminosae and Robinia. Bark is grayish brown to dark brown, shallow to deep longitudinal, thin and smooth, originated in North America, and is now widely introduced to Asia, Europe and other places. Robinia pseudoacacia bark is thick, dark and cracked. There are a pair of thorns 1~2mm long at the root of the leaves; Flowers are white, fragrant and spikes; The fruit is a pod with 4~ 10 seeds in each pod. Robinia pseudoacacia wood is hard, corrosion-resistant, slow to burn and high in calorific value. Robinia pseudoacacia flowers are edible. The honey produced by Robinia pseudoacacia flowers is very sweet and the honey yield is also high. Cultivated varieties include Robinia pseudoacacia, Robinia pseudoacacia and Robinia pseudoacacia. Among all Sophora japonica trees, Sophora hongsenensis grows fastest and is called the king of Sophora japonica trees.