Hypericum perforatum, known as perforate St John’s-wort, is a flowering plant in the family Hypericaceae and the type species of the genus Hypericum. St. John’s wort is a plant with yellow, star-shaped flowers.
St. John’s wort is most commonly used for depression and mood disorders. There is some strong scientific evidence that it is effective for mild to moderate depression. St. John’s wort is also used for symptoms of menopause and many other conditions.