Isatis Root

Date: Dec 17, 2019
Source: This Site
Author: Site Editor

Radix Isatidis
Isatis Root


The root of Isatis indigotica Fort. (Fam. Cruciferae).

Mainly in Chinese provinces such as Hebei and Jiangsu. Introduced to and cultivated in most regions of China.

Harvest & Processing
Dig out roots in autumn; remove stemsand leaves; wash clean and dry under the sun; store in cool, dry places.

Cylindrical, slightly twisted; 10-20 cm long, 0.5-1 cm in diameter. Outer surface pale greyish-yellow or pale brownish-yellow, marked with longitudinal wrinkles, transverse lenticels and branch roots or branch root scars; top part slightly bulgy, with verticillate (arranged in whorls) dull green or dull brown remnants of petiole base, petiole scars and dense verruciform (wart-shaped) protuberances. Solid and slightly brittle. When broken, surface fairly even; bark yellowish-white, occupying about 1/2-3/4 of radius; xylem yellow.

1. Seasonal febrile diseases, pestilence
2. Mumps and other eruptive exanthem
3. Aphthous ulcer, sore throat

Chemical Composition
Mainly contains indigotin and indirubin.