The dark green leaves have oil glands which look like tiny perforations on their undersides.
St John's wort is widely known as a herbal treatment for depression. In some countries, such as Germany, it is commonly prescribed for mild depression.
Medicinal Action and Uses
Aromatic, astringent, resolvent, expectorant and nervine. Used in all pulmonary complaints, bladder troubles, in suppression of urine, dysentery, worms, diarrhoea, hysteria and nervous depression, haemoptysis and other haemorrhages and jaundice. For children troubled with incontinence of urine at night an infusion or tea given before retiring will be found effectual; it is also useful in pulmonary consumption, chronic catarrh of the lungs, bowels or urinary passages. Externally for fomentations to dispel hard tumours, caked breasts, ecchymosis.