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true indigo

plant

Also known as: Indigofera tinctoria

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In indigo
Some species, particularly true indigo (Indigofera tinctoria) and Natal indigo (I. arrecta), were once an important source of indigo dye. The cultivation of indigo plants and the extraction of the dyestuff were an important industry in India up to the beginning of the 20th century. Synthetic indigo, developed…
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