Robinia pseudoacacia has pinnate compound leaves, with a length of 15 to 30 cm, a pubescent leaf axis, 5 to 7 pairs of leaflets, ovoid, ovoid, nearly round or broadly elliptic, with a length of 1.8 to 5 cm and a width of 1.5 to 3.5 cm. Sophora japonica has 7 to 19 pinnate compound leaves with oval or oval leaves. It is about 3 to 6 cm long, with dark green leaves and shiny surface.

Second, the difference between flowers

Robinia pseudoacacia racemes axillary. Except the corolla, all the flowers are covered with purple glandular hairs and white villi. There are 3~8 flowers, and the total pedicel length is 4~8.5 cm. Bracts ovate, lanceolate, 5 to 6 mm long. Calyx purplish red, obliquely bell-shaped. Corolla red to rose red, flag petal nearly kidney-shaped. It is about 2 cm long and 3 cm wide. Sophora japonica is a dense raceme with red flowers, which can produce 200 to 500 small flowers at the same time.