Dyer's greenweed, also known as woadwaxen, is a small shrub that typically grows in open, grassy areas. It is a perennial plant that produces yellow flowers and is known for its medicinal properties and use in dyeing. While the term "dyer's greenweed" is the most commonly used name for this plant, there are several other synonyms that refer to it. These include woad wax, genista tinctoria, tinctoria, and dyer's broom. Each of these names accurately reflects the plant's historical use in dyeing and its association with the textile industry. Regardless of which term you use, Dyer's greenweed is a plant with a rich and storied history.