2. Phellodendron amurense belongs to the genus Phellodendron of Rutaceae. Small trees, 3- 10 m high, glabrous branchlets, oblong or round tiny lenticels, brown, odd pinnate compound leaves, opposite; Leaflets 7-9, papery, ovate-lanceolate. The top of wampee tree is long and tapering, the base is round or wide wedge-shaped, the two sides are asymmetrical, the surface is almost hairless or the midvein is sparse, especially the midvein is densely hairy at the base, the edge is serrate, the petiole is 2-7 mm long, and the ventral surface is sparse. Flowers are unisexual, arranged in a terminal cyme by a hundred panicles, berrylike drupe, subglobose, with 4-5 seeds, ovoid seeds and reticulate wrinkles on the surface. The flowering period is April-May, and the fruit ripens in August-65438+10.