There are 5 to 7 pairs of leaflets, which are oval, ovate, semicircular or broad ovate, 1.8 to 5 cm long and 1.5 to 3.5 cm wide.
There are 7 to 19 pinnately compound leaves of Robinia pseudoacacia. The leaves are oval or oval. Grow about 3 to 6 cm, dark green leaves, glossy surface
The flower heads of Robinia pseudoacacia are axillary. Except for the corolla, the flowers are covered with purplish red glandular hairs and white villi. 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, obliquely bell shaped. The Corolla is red to rose red. The flag petals are nearly kidney shaped, about 2 cm long, about 3 cm wide, and the apex is concave.
The flower of Sophora pseudoacacia has a dense raceme, with red flowers. It can produce 200 to 500 small flowers at the same time.
