1、 Different plant morphology

1. Cassia bipinnata: it belongs to a small tree, and its branches are very lush. Generally, there are branches to reproduce at a place close to the ground, and its branches are very small and grow very disorderly. Generally, there is no trunk. Its bark is relatively smooth, and there are some fine hairs on its branches and leaves

2. Cassia: it is an upright shrub, generally five to seven meters high. But its branches have no hair

2、 Different growth habits

1. Cassia bipinnata: it has strong wind resistance, especially strong germination ability, and well-developed root system. It is suitable for growing in acidic or latosol with appropriate fertility

2. Yellow locust Cassia: it is not resistant to wind, ponding and depression, and its requirements for soil are not much. Generally, low and gentle slopes with similar fertility and both sides of the road can adapt to its growth

3、 The flower forms are different

1. Double pod Cassia: its flowers contain ten stamens, seven of which can bear, and the remaining three degenerate and have no anthers. Among the seven stamens that can bear, three are particularly large, higher than its petals, and the remaining four are shorter than the petals. Half of its flowering period is from October to November, and the fruiting period is from November to march of the next year

2. Cassia obtusifolia: compared with cassia obtusifolia, all its ten stamens can bear. Moreover, the flowers of yellow locust are relatively large, and the petals are bright yellow or dark yellow. It has a long flowering period and blooms almost all year round, half of which are concentrated in March to December

4、 Leaves are different from pods

1. Double pod Cassia: the leaves are relatively long, and its pods grow in pairs, round and long. Half of the leaflets of the compound leaves are three to four pairs

2. Cassia: the leaves are flat and oval. The number of leaflets of compound leaves is seven to nine pairs

5、 Different fruits

1. Double pod Cassia: its fruit is columnar

2. Cassia: its pods are flat