Red Gardenia (shanzhizi, or simply zhizi) is the fruit of Gardenia jasminoides, one of the frequently used herbs in Chinese medicine. It has an intense bitter taste and a relatively strong cold nature. Yang Gardenia is bitter and cold and enters the heart, lung, and triple burner meridians. Bitterness and cold may clear heat and descend fire. Gardenia can gently and slowly direct heat downwards from the upper burner. It can also promote urination and leach out heat from the heart and lung. It can be used for heat accumulation in the chest, irritability, restlessness, sensations of tightness in the chest, and insomnia.