Poncirus trifoliata is a deciduous shrub native to northern China and Korea, also commonly known as trifoliate orange or hardy orange. This plant typically grows up to 6 meters tall, with a trunk diameter of up to 20 centimeters. The tree has thorny branches with leathery, shiny, dark green leaves that consist of three leaflets. Some synonyms for trifoliate orange include bitter orange, Chinese lemon, and Japanese bitter orange. The fruit of the Poncirus Trifoliata resembles a small orange and has a sour taste, often used in making marmalades and medicinal purposes since it is high in Vitamin C.