Definition
Milfoil refers to plants with finely divided, feather-like leaves, especially yarrow (*Achillea millefolium*). Think of milfoil as a plant with leaves resembling a thousand tiny leaflets. It's like a meticulously crafted work of art by nature. The name often applies to aquatic plants as well, causing some confusion. It's found in various habitats, from gardens to wetlands, showing its adaptability.