Asperula tinctoria

Asperula tinctoria, common name dyer's woodruff, is a plant in the family Rubiaceae, a native of much of northern and central Europe from France to Russia and also of Western Siberia.
Uses.
The root is used by the ancient Greeks and Romans to make a red dye for clothing, but is less productive than the more widely used madder "Rubia tinctorum".