1、 Leaf difference

Robinia pseudoacacia pinnately compound leaves, 15 to 30 cm long, leaf axes with pubescence, 5 to 7 pairs of leaflets, oval, ovate, suborbicular or broadly ovate, 1.8 to 5 cm long and 1.5 to 3.5 cm wide

Sophora japonica has 7 to 19 pinnately compound leaves, and the leaves are oval or oval oblong. About 3 to 6 cm long, the leaves are dark green and glossy

2、 Flower difference

The raceme of Robinia pseudoacacia is axillary. In addition to the corolla, the flowers are covered with purplish red glandular hair and white fine pilose hair. There are 3 to 8 flowers. The total pedicel is 4 to 8.5 cm long, the bracts are ovate lanceolate, 5 to 6 mm long, the calyx is purplish red, oblique bell shaped, the Corolla is red to rose red, the flag petal is close to kidney shaped, about 2 cm long, about 3 cm wide, and the apex is concave

The fragrant flower Sophora japonica has dense flowers to form racemes with red flowers, which can produce 200 to 500 small flowers at the same time