Different: The main difference between Sophora japonica and Sophora japonica is that its branches have thorns, and the flowering period is May and late spring. The branches of Sophora japonica have no thorns, and the flowering period is August and September, and the end of summer. Detailed comparison: 1, Sophora japonica, scientific name: Sophora japonica ... Branches: 15-25m high, dry skin dark gray, green branchlets, obvious lenticels. Branches and leaves: the length of pinnate compound leaves is15-25 cm; Leaf axis is hairy and the base is enlarged; 9- 15 lobules, oval, 2.5-7.5 cm long, 1.5-5 cm wide, tapering at the top, broadly cuneate at the base, grayish white below, sparsely pubescent. Trivia: panicle terminal, calyx bell-shaped, with 5 small teeth; The corolla is milky white, the flag is wide and heart-shaped, the claws are short, the pulse is purple, and the edge of the wing keel is slightly purple. Fruit: pods are fleshy, beaded, 2.5-5 cm long, hairless and indehiscent; 1-6 seeds, kidney-shaped. 2, Robinia pseudoacacia, scientific name: Robinia pseudoacacia ... branches: 10-20 meters high, dark brown bark, longitudinally split, branches with stipular needle eyes. Branches and leaves: branchlets are gray-brown, spiny, entire, green on the surface, puberulent, gray-green on the back, with short hairs. Trivia: racemes axillary, shorter than leaves, inflorescence axis yellowish brown, sparsely short hair; Pedicel is 8-13mm long. Pubescent, calyx campanulate, with irregular 5 teeth, short hairs on the surface; Corolla white, fragrant, flag petal nearly round, long 18 mm, base claw, slightly concave apex, oval wing petal, slender base claw, round top, long 18 mm, keel petal bent inward, long base claw. The flowering and fruiting period is from May to September. Fruit: The pod is flat, linear, rectangular, 3- 1 1 cm long, brown and smooth. Contains 3- 10 seeds with two petals.