Rubia is a genus of flowering plants in the family Rubiaceae. It includes several species, the most notable being Rubia tinctorum, commonly known as madder. This plant has been historically used for its roots, which produce a red dye used in textiles. Madder dye has been valued since ancient times, particularly in Egypt and India, for coloring fabrics. The plant thrives in temperate regions and is often found in meadows and along roadsides. Besides its dyeing properties, some species of Rubia have been used in traditional medicine for various ailments.