Purple locoweed is a tall plant with long spikes of bright purple flowers. Other names for this plant include purple milkvetch, purple crazyweed, and purple rattleweed. It grows in dry and rocky areas and is often found in the southwestern United States. The plant is known for its toxic effects on livestock, causing them to become disoriented and sometimes even lead to death if consumed in large amounts. Despite its toxicity, it has been used for medicinal purposes by Native Americans for centuries. While it goes by many names, purple locoweed is a unique and recognizable plant with striking purple blooms.