The Trifid Bur Marigold, scientifically known as Bidens tripartita, is a type of flowering plant commonly found in damp meadows and along rivers and streams. This plant is also known by several other names, including Water Agrimony, Three-lobe Beggarticks, Spanish Needles, and Stinking Willie. It gets its name from the three-pronged shape of its leaves and the bur-like seed heads that stick to clothing and fur. The bright yellow flowers of the plant attract bees, butterflies, and other insects, making it a valuable addition to pollinator gardens. Overall, the Trifid Bur Marigold is a versatile and attractive wildflower, with many different names reflecting its unique characteristics.