There are 3-8 pairs of small leaves of rain tree, which gradually become smaller from top to bottom. They are oblong, about 2-4cm long and 1.1.8cm wide. There are 3-5 pairs of pinnae, about 15cm long and about 15-40cm in total petioles. There are 10-30 pairs of small leaves of Acacia tree, which are linear to oblong, much smaller than the former. There are 4-12 pairs of feathers, and the total petiole is about 3-5cm.
The flower of rain tree is capitulum, which grows in the axil of the leaf. The color of the flower is rose red, the diameter is about 5-6cm, and the total peduncle is about 5-9cm. The flower of the acacia tree is a head like inflorescence, arranged in a panicle like large debate inflorescence at the top of the branch, the color of the flower is pink, the Corolla is slightly short, the lobes are triangular, the calyx and corolla have pubescence.
