genus rubia

[diannvq4]

type genus of the Rubiaceae; Old World herbs and subshrubs grown for their medicinal properties and for dye substances extracted from their roots

[Frankykap]

The genus Rubia is a group of flowering plants in the family Rubiaceae, commonly known as madder. It includes perennial climbing plants with evergreen leaves and small, star-shaped flowers. The most well-known species is Rubia tinctorum, or common madder, which was historically used to produce red dye. The roots of plants in the Rubia genus contain a compound called alizarin that produces this dye.