Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin.  Synonym: madder.
 
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"Rubia tinctorum" Quotes from Famous Books — Field's Chromatography - or Treatise on Colours and Pigments as Used by Artists • George Field  | 
Words linked to "Rubia tinctorum" :   madderwort, rubiaceous plant, madder  | 
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