1, the number of leaves is different: Ailanthus altissima has odd pinnate compound leaves, while Toona sinensis generally has even pinnate compound leaves.

2, the leaves taste different: Ailanthus altissima leaves have different smells, and Toona sinensis leaves have a strong fragrance.

3, the trunk is different: the trunk surface of Ailanthus altissima is smooth and does not crack, while the trunk of Ailanthus altissima often falls off in pieces.

4. Different fruits: Ailanthus altissima fruit is samara, while Toona sinensis fruit is capsule.

5. Different vascular bundles: Observing the leaf scars, there are 9 vascular bundles in Ailanthus altissima and 5 in Toona sinensis.

6. Ailanthus altissima, a deciduous tree, has a gray to gray-black bark, formerly known as chū, also known as Ailanthus altissima and Ailanthus altissima, and is named after the smell from the gland points at the base of the leaves. It is native to the northeast, central and Taiwan Province provinces of China. Growing in a mild climate. This kind of tree grows rapidly and can reach the height of15m in 25 years. This species has a short life span, and rarely survives for more than 50 years.