Rhizoma Coptidis Yunnanensis (Yun Huang Lian)

Rhizoma Coptidis Yunnanensis (Yun Huang Lian)

　　The dried rhizome of the perennial herbaceous plant Coptis teeta from the Ranunculaceae family. The Ming Dynasty’s Lan Mao wrote in his work *Dian Nan Ben Cao* (“Materia Medica of Southern Yunnan”): “Dian Lian, also called Yun Lian… its efficacy is a hundred times better than that of Sichuan Coptis.” Hence it earned the name “Yun Lian” (Cloud Coptis). It has always been popular in inland areas and Hong Kong. The original plant’s rhizome is yellow, with few branches; leaves grow from the base; the plant height is 15–30 cm; it has a multi-branched cyme inflorescence; long-beaked pod fruit, seeds are oblong; flowering and fruiting period is February to June. The commercial product appears as curved, elongated strips featuring a “bridge stem,” with a golden-yellow cross-section and an extremely bitter taste. It can purge fire, dry dampness, detoxify, kill parasites, and treat various types of heat toxins and burns. It contains multiple alkaloids, whose content and anti-inflammatory and antibacterial efficacy are superior to those of Sichuan Coptis. Along with Sichuan’s “Ya Lian” (Dendrobium-type Coptis), it is ranked as a premium variety among Coptis herbs and enjoys a renowned reputation both domestically and internationally. It is a famous medicinal herb from Yunnan highly favored by physicians throughout the ages. It is mainly produced in Fugong, Gongshan, and Tengchong. Tengchong’s Yun Huang Lian is also known as “Guangming Lian” (Bright Coptis). In Yunnan, 22 tons were purchased in 1955, 5 tons were exported in 1988, and production in 1996 was approximately 4–6 tons. The market price of Yun Huang Lian is 2–3 times higher than that of Sichuan Coptis. It is propagated via rhizomes, cultivated or semi-cultivated, with high cost, labor intensity, and low yield per unit area (only 0.5–2 kg per mu).