(1) Long-jawed acacia: tiny branches bend and droop, the crown is umbrella-shaped, and many of them are planted in gardens.

(2) purple-flowering acacia: 15 to 17 leaflets, the leaves are covered with blue-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 to 5 clusters, 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.