Yarrow is a perennial herb that can be found growing in meadows, woods, and roadside verges. The plant has a very distinctive appearance, with a long, slender stem and flat, clustered flowers. The leaves are finely divided and have a strong scent. Yarrow comes in a variety of colors, including white, yellow, pink, and purple. When identifying yarrow, it is important to look for these key features. However, it is also worth noting that the plant can be easily confused with similar species such as Conium maculatum or Daucus carota. If you are unsure which plant you are looking at, it is always best to seek an expert's advice.