- Rubia tinctorum
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Rubia tinctorum 
Rubia tinctorum flowers Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots (unranked): Asterids Order: Gentianales Family: Rubiaceae Tribe: Rubieae Genus: Rubia Species: R. tinctorum Binomial name Rubia tinctorum
L.Rubia tinctorum, the common madder or dyer's madder, is a plant species in the genus Rubia.
The plant's roots contain several polyphenolic compounds like 1,3-Dihydroxyanthraquinone (purpuroxanthin), 1,4-Dihydroxyanthraquinone (quinizarin), 1,2,4-Trihydroxyanthraquinone (purpurin) and 1,2-dihydroxyanthraquinone (alizarin). This latter gives its red colour to a textile dye known as Rose madder. It was also used as a colourant, especially for paint, that is referred to as Madder lake. The substance was also derived from another species, Rubia cordifolia.
External links
- http://www.henriettesherbal.com/eclectic/kings/rubia.html
Data related to Rubia tinctoria at Wikispecies
Media related to Rubia tinctoria at Wikimedia Commons
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