1、 Tree difference

Wuwuzi is a tall tree, which can grow to more than 20m. Its bark is grayish brown or dark brown, and its twigs are green without fluff

The height of Luan tree is not as high as the former, and generally can only grow to 7-13m

2、 Blade difference

The total length of leaves and petioles of Sapindus is 25-45cm. Its leaves have 5-8 pairs of leaflets, paper, long oval, 7-15cm long and 2-5cm wide

The length of Luan leaves can reach 50cm, with no petiole or very short petiole. It has 5-9 pairs of leaflets on its leaves, which are papery, broad and oval, with a length of 5-10cm and a width of 3-6cm, which is a little rounder than the leaflets of the former