Tanacetum vulgare, commonly known as tansy, is a flowering plant in the family Asteraceae. This plant is known for its medicinal properties and has been used for centuries in traditional medicine. Tansy has several synonyms including common tansy, golden buttons, bitter buttons, and garden tansy. The name "golden buttons" comes from the plant's bright yellow flowers that bloom in summer. "Bitter buttons" refers to the plant's bitter taste, which is due to the presence of essential oils. Tansy is also referred to as "garden tansy" because it is often grown in gardens for its medicinal uses as well as for decorative purposes. Regardless of the name you use, tansy remains a popular plant known for its medicinal benefits.