Berberis dye

A yellow dye obtained from any of several sources, most often the stems and roots of the common barberry (Berberis vulgaris) bush. Berberis contains the colorants berberine (berberine bisulfate, berberine sulfate, berberine hydrochloride), berbamine, and oxyacanthine along with some soluble tannins. The yellow color is substantive on wool, leather, and silk. It has also been used as a yellow lake pigment for coloring prints. In addition to the barberry, other sources of berberines include goldenseal (Hydrastis canadensis) plants and bark from the amur cork tree (Phellodendron amurense).