Pseudomonas officinalis, also known as Pseudomonas officinalis, Pseudomonas officinalis, Pseudomonas officinalis Pseudomonas officinalis, is the root bark of perennial herbs of Rutaceae Pseudomonas officinalis Pseudomonas officinalis. Mainly produced in Liaoning, Hebei, Sichuan, Jiangsu other places. Spring, autumn two seasons to dig the root, remove sediment rough bark, peel off the root bark, slice, dry. Born with. It has the effect of clearing heat dryness, dispelling wind detoxification. "On medicinal property" : "cure all hot poisonous wind, bad wind, wind sores, scabies red rotten, eyebrow hair brittle, skin muscle acute, strong heat cold; The main heat yellow, wine yellow, urgent yellow, grain yellow, yellow so on. Modern research shows that the volatile oil of this product has anticancer effect in vitro. But the spleen stomach deficiency cold with caution.