Any of several plants, of the genus Hypericum, that have yellow flowers and traditionally ward off evil.
Wiktionary
St-john-s-wort Sentence Examples
Thus, in Malvaceae the corolla is contorted and the calyx valuate, or reduplicate; in St John's-wort the calyx is imbricate, and the corolla contorted.
Meanwhile, is St John's wort a way forward for the mildly depressed?
By inhibiting MAO and increasing norepinephrine, St John's Wort may exert a mild antidepressive action.
It subsequently transpired that the patient was taking St John's wort at the time of the treatment.
