Polygonatum sibiricum (scientific name: Polygonatum sibiricum), also known as: chicken-head yellow essence, yellow chickweed, pennyroyal, claw ginseng, tiger ginger, chicken-claw ginseng, is a genus of yellow essence. The rhizome is transverse, cylindrical, nodular and expanded; the leaves are whorled and sessile. It is a sweet tonic with moist texture, flat but not partial, with gentle action, entering the spleen, lung and kidney meridians, and is a flat tonic for qi and yin. It is a commonly used herbal medicine in China for both food and medicine. According to "The Materia Medica", yellow essence "tonic for five labors and seven injuries", help tendons and bones, thirst, cold and summer, benefit the spleen and stomach, moisten the heart and lungs", has "yellow essence with ginseng and astragalus" reputation. The yellow essence can be divided into ginger-shaped yellow essence, chicken head yellow essence and big yellow essence three. The original plant of ginger yellow essence is yellow essence, the original plant of chicken head yellow essence is yellow essence, and the original plant of big yellow essence (also known as disc-shaped yellow essence) is Dian yellow essence. Among the three, the quality of ginger-shaped yellow essence is the best. Multi-flowered yellow essence is mainly produced in Guizhou, Hunan, Sichuan, Hubei, Anhui, Shaanxi and other provinces.
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