Isatis tinctoria, with woad (d) or glastum as the common name, is a flowering plant in the family Brassicaceae. It is commonly called dyer`s woad. 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 e....