Dyer's Woad is a plant that is known for its ability to produce a natural blue dye. However, there are several synonyms for this plant, including Isatis tinctoria, Woadwaxen, Asp of Jerusalem, and Glastum. These different names are used in different regions and cultures, but they all refer to the same plant. The name Woadwaxen comes from the plant's use as a yellow dye, while Asp of Jerusalem is a reference to the plant's use in medicine. Glastum refers to the plant's use in ancient Britain, where it was used to create blue body paint for warriors. Whatever its name, Dyer's Woad continues to be an important plant for its dyeing and medicinal properties.
