Rubia Tinctorum, commonly known as madder, is a flowering plant in the Rubiaceae family. It is primarily cultivated for its roots, which contain a natural dye called alizarin. This dye has been used for centuries to produce a range of red and pink shades in textiles. The plant thrives in well-drained soil and prefers sunny locations. Historically, Rubia Tinctorum was a significant source of red dye in Europe and Asia, often used in the dyeing of wool and cotton. Its use has declined with the advent of synthetic dyes, but it remains valued in natural dyeing practices.