Rubia cordifolia L.
Madder comes from the roots of the Rubia cordifolia L. plant. It has been used since ancient times as a red and orange dye for leather, wool, cotton and silk. The roots contain the dye compounds alizarin and purpurin, which give red and yellow colors. By adjusting the pH of the dye bath it is possible to get shades of peachy coral to deep turkey red which madder is so famous for.