Phellodendron amurense

Phellodendron amurense is a species of tree in the family Rutaceae, commonly called the Amur cork tree. It is a major source of huáng bò (Chinese: 黄柏 or 黄檗), one of the 50 fundamental herbs used in traditional Chinese medicine. The Ainu people used its fruit, called "shikerebe-ni" (in Ainu, sikerpe), as a painkiller. It is known as hwangbyeok in Korean and (キハダ) kihada in Japanese.

It is native to eastern Asia: northern China, northeast China, Korea, Ussuri, Amur, and Japan, the Amur cork tree is considered invasive in many parts of North America. The State of Massachusetts lists it as a noxious weed.