Rubia is a genus of the madder family Rubiaceae, which contains about 80 species of perennial scrambling or climbing herbs and sub-shrubs native to the Old World, Africa, temperate Asia and America. The genus and its best known species are also known as Madder, Rubia tinctorum (Common Madder), Rubia peregrina (Wild Madder), and Rubia cordifolia (Munjeet or Indian Madder).

The Common Madder can grow up to 1.5 m in height. The evergreen leaves are approximately 5–10 cm long and 2–3 cm broad, produced in whorls of 4–7 starlike around the central stem. It climbs with tiny hooks at the leaves and stems. The flowers are small (3–5 mm across), with five pale yellow petals, in dense racemes, and appear from June to August, followed by small (4–6 mm diameter) red to black berries. The roots can be over a metre long, up to 12 mm thick and the source of red dyes known as rose madder and Turkey red. It prefers loamy soils (sand and clay soil) with a constant level of moisture. Madders are used as food plants for the larvae of some Lepidoptera species including the Hummingbird Hawk Moth.

Read more about Madder:  Species, Uses, History

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Madder Rose
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... Weguelin's palette included "vermilion, light red, rose madder, purple madder, brown madder, yellow ochre, cadmium 1 and 2, oxide of chromium, oxide of chromium (transpare ... aureolin, cadmium orange, raw sienna, burnt sienna, purple madder, rose madder, light red, brown madder, Vandyke brown, raw umber, and flake white and occasionally vermilion, burnt umber, and lampblack." ...
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... The dye used in this case was madder, which, along with other dyes such as indigo, was introduced to other regions through trade ... insect dyes such as Tyrian purple and kermes and plant-based dyes such as woad, indigo and madder were important elements of the economies of Asia and Europe ... Alizarin, the red dye present in madder, was the first natural pigment to be duplicated synthetically in 1869, a development which led to the collapse of the market for naturally grown madder ...

Famous quotes containing the word madder:

    Are we not madder than those first inhabitants of the plain of Sennar? We know that the distance separating the earth from the sky is infinite, and yet we do not stop building our tower.
    Denis Diderot (1713–1784)