Woad

Woad (or glastum) is the common name of the flowering plant Isatis tinctoria in the family Brassicaceae. It is occasionally known as Asp of Jerusalem. Woad is also the name of a blue dye produced from the plant.

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Woad is native to the steppe and desert zones of the Caucasus, Central Asia to eastern Siberia and Western Asia (Hegi), but is now found in southeastern and some parts of Central Europe as well. It has has been cultivated throughout Europe, especially in Western and southern Europe since ancient times.

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Flowering plant: Magnoliopsida - Dicots...

Blue: :For other uses, see Blue (disambiguation)...

Dye: A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is being applied. The dye is usually used as an aqueous solution, and may require a mordant to improve the fastness of the dye on the fibre. In contrast, a pigment generally has no affinity fo...