Yellowstone bark is mostly born in crevices beside streams under forests, also known as kidney fern and fern. It is the medicinal spherical tuber or whole grass of Drynaceae. It can be harvested all year round, and it can be cleaned and used fresh or dried in the sun for later use. Stone yellow skin tastes sweet, light, slightly astringent and slightly cool. Has the effects of clearing away heat, promoting diuresis, calming lung, relieving cough, promoting digestion, and resolving food stagnation.

Indications: 1. Cold and fever, tuberculosis and hemoptysis; 2. Enteritis and diarrhea; 3. Chronic dysentery; 4. Infant malnutrition; 5. Testitis and mastitis; 6. Urinary system infection. Spend 5 yuan to 1 each time, and decoct in water.

Prescription: 1. Cold and fever, chronic bronchitis: Shihuangpi 5 yuan, decocted in water.

2. Testitis: fresh stone wampee 1.000, or fresh bone and muscle grass root 1.000, dried litchi 10, decocted in wine.

3. Mastitis: Apply appropriate amount of Lithocarpus or whole grass to the affected area.

Source: Hong Kong Chinese herbal medicine, edited by Zhuang Li. Commercial press