Evening Primjoses are annual or biennial herbs in the genus Leviticaceae.Because Olei Oenotheraebiermis contains Polyunsaturated Fatty Acid, PUFA, especially contains rare in the plant world, the body itself can not synthesize the essential nutrients 7 - Lin-lenic Acid; GLA. It has a wide range of applications in food, health products, animal feed and so on.