Pinellia, is a Chinese herb from the Araceae family. Pinellia is native to southern China and Japan and commonly referred to as the Green Dragon because of the color and shape of the plant’s flower with its long, tongue-like extension of its spadix. Pinellia’s root is the part of the plant used in Chinese Herbal Medicine. To process the root for medicinal use, it is boiled, salted, soaked, steamed and fried with ginger, alum solution, licorice or lime to eliminate all the toxicity of the raw herb. This now processed root is known in Chinese Herbal Medicine as Ban Xia. It is one of the most important herbs in Chinese medicine to dry dampness and transform cold phlegm. While commonly used as an assistant in formulas to expel phlegm in the lungs, ban xia really takes center stage in transforming cold phlegm conditions in the spleen and digestive tract. Thin cold phlegm in the digestive tract is often the result to chronic insufficiency or hypo-functioning. In our culture, this is commonly attributed to dietary intemperance and overeating, which we’re pretty good at.
The spicy and warm nature of the root has an affinity for the lung, spleen and stomach channels. Ban Xia’s actions in the body helps to dry dampness, transform cold phlegm, and descend rebellious qi which can cause stomach upset and vomiting, due to excessive bogginess in the digestive system. By drying excessive mucus and providing directionality in the digestive system, Ban xia is pivotal in reducing distension and stuffiness in the chest or abdomen.