Sophora trees of the same family color, sparsely pubescent. Panicles terminal; calyx campanulate, with 5 denticles; corolla creamy white, flag petals broadly cordate, shortly clawed, and with purple veins, winged petals keeled petal margin slightly purplish; stamens 10, unequal. Pods fleshy, beadlike, 2.5-5 cm long, glabrous, indehiscent; seeds 1-6, reniform. Flowering and fruiting September-December.

(1) Longjaw acacia: branchlets curved and pendulous, the crown is umbrella-shaped, many planted in the garden.

(2) Purple acacia: 15-17 leaflets, the leaves are bluish gray silky pubescent; the wing petals and keel petals of the flowers are often purplish, and the flowering period is the latest.

(3) five-leaf acacia: leaflets 3-5 clustered, terminal leaflets often 3-lobed, lateral leaflets often have large lobes in the lower part.

(4) Golden acacia: the lower part of the lateral leaflets often have large lobes, the back of the leaf is hairy, and the branches are yellow.