Oenothera biennis (common evening-primroseevening star, or sun drop) is a species of Oenothera native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. Evening primrose oil is produced from the plant.



The mature seeds contain approximately 7–10% gamma-linolenic acid (GLA), an essential fatty acid. Evening primrose oil (EPO), containing GLA, is often used to treat some medical conditions, and is considered a dietary supplement rather than a drug.

The plant’s leaves are edible and traditionally were used as a leaf vegetable. The roots are also edible.


The oil of oenothera biennis, the common evening primrose, is used medicinally to help treat a wide variety of ailments, earning the plant the historical name King’s cure-all. This herb is also called evening star, evening plant, fever plant and field primrose. The oil is used to treat the discomfort associated with premenstrual syndrome and premenstrual stress, breast ailments, migraines, asthma, eczema, inflammation, high cholesterol levels, heart disease, rheumatoid arthritis, diabetes and multiple sclerosis. A warm poultice made from oenothera biennis helps heal bruises, and Native Americans traditionally made a tea from the root for bowel discomfort. The plant’s shoots and roots have also been used as a food source.


EPO is considered likely to be safe in recommended doses. It may increase the risk of bleeding, a concern for patients with bleeding disorders or taking drugs that may increase bleeding. The Mayo clinic recommends caution in people with seizure disorders or mania, and by pregnant or breastfeeding women, and publishes a long list of possible side-effects.


None are recorded.

Other names

common evening-primrose, evening star, or sun drop


Source: Wikipedia, https://en.wikipedia.org/wiki/Oenothera_biennis#Uses

WiseGeek, http://www.wisegeek.com/what-are-the-medical-uses-of-oenothera-biennis.htm

































































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