Evening primrose (Oenothera L.) is a plant of the Onagraceae family. There are about 145 species found in temperate and tropical climate regions of North and South America. Some species have adapted to new areas inhabited by countries on the European continent and there are now about 70 species in Europe. Between March and May, yellow-yellowish orange purple color and fragrant flowers, 10-30 cm high, is a multi-year herbaceous plant. It is found in the bottom of the forest and in wetland meadow Leaves are rosette-shaped oval or elongated oval shaped at the base, the edges are wavy and narrowed in the form of stalks towards the base. , 5 pieces at the end Fruit is opened with holes in the top scattering seeds. It is frequently preferred as an ornamental plant in addition to the benefits it provides to the body in terms of health. It is also known with names like spring blossom and bear ears. Oil extracted from the flower is also used for health purposes in many areas.