Madder

Also called  Dyer's Madder,  any of several species of plants belonging to the genus Rubia of the madder family, Rubiaceae. Rubia tinctorum and R. peregrina are native European plants, and R. cordifolia is native to the hilly districts of India and Java. Rubia is a genus of about 40 species; its members are characterized by lance-shaped leaves that grow in whorls and by small yellowish flowers that