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Dyer’s Woad

Isatis tinctoria (species), “Glastum”, “Asp of Jerusalem”, “Istasis Indigotica”, “Woad”

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Isatis tinctoria, also called woad (), dyer's woad, or glastum, is a flowering plant in the family Brassicaceae. It is occasionally known as Asp of Jerusalem. Woad is also the name of a blue dye produced from the leaves of the plant. Woad is native to the steppe and desert zones of the Caucasus, Central Asia to Eastern Siberia and Western Asia (per Hegi) but is now also found in South-Eastern and Central Europe and western North America. Since ancient times, woad was an important source of blue dye and was cultivated throughout Europe, especially in Western and Southern Europe. In medieval times there were important woad-growing regions in England, Germany and France. Towns such as Toulouse became prosperous from the woad trade. Woad was eventually replaced by the more colourfast…

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Range Maps show field notes recorded by Natural Atlas contributors and other datasets via GBIF.org

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