Indigowoad Leaf / Daqingye

Indigowoad Leaf / Daqingye

Indigowoad Leaf, also known as Daqingye, is a traditional herb recognized for its bitter taste and cold properties. It is widely employed for its powerful healing abilities to clear heat, resolve toxins, cool the blood, and stop bleeding. Daqingye is particularly effective in addressing a range of acute conditions, including pyrexia and febrile diseases due to infections, flu, acute infectious hepatitis, bacillary diarrhea, acute gastroenteritis, and acute pneumonia.

Furthermore, it is beneficial for treating erysipelas, hematemesis, non-traumatic hemorrhage, jaundice, dysentery, throat impediment, sore mouth, ulcers, and swollen toxins. Its broad spectrum of applications makes Indigowoad Leaf a valuable component in traditional herbal therapies aimed at promoting health and alleviating symptoms associated with various heat-related ailments.

Chinese Name	大青葉
Chinese Pinyin	Daqingye
English Name	Indigowoad Leaf
Latin Pharmaceutical Name	Isatidis Folium
Category	Leaves
Origin	The dried leaves of Isatis indigotica Fort. (Brassicaceae).
Production Regions	Primarily produced in the Chinese provinces of Jiangsu, Anhui, Hebei, Shaanxi.
Macroscopic Features	Wrinkled into lumps, sometimes mashed, grayish-green or yellowish-brown. Intact leaf is long elliptical to oval-oblanceolate, 4~11cm long, 1~3cm wide, entire leaf margin or slightly waved; apex is blunt and round, base is gradually narrowed to the petiole, appearing wing-like, some with raised spots on the upper surface and obvious middle vein on the lower surface. Leaf stem is 5~7cm long, ventral surface is slightly indented. Brittle and easily broken texture; faint odor; slightly bitter taste.
Quality Requirements	Superior medicinal material has large leaves without leaf stem, dark grayish-green.
Properties	Bitter; cold.
Functions	Clear heat, resolves toxin, cools blood, stops bleeding. Apply to pyrexia and dipsesis due to pyreticosis, flu, acute infectious hepatitis, bacillary diarrhea, acute gastroenteritis, acute pneumonia, erysipelas, hematemesis, non-traumatic hemorrhage, jaundice, dysentery, throat impediment, sore mouth, ulcer and swollen toxin.