Crown vetch, a perennial legume plant, can be found in several regions around the world. The plant is famous for its ability to tolerate extreme weather conditions, and it is commonly planted in erosion-prone areas or along highways. Crown vetch is also known by several other names, including purple crowns, axseed, and coronilla. The plant is referred to as purple crowns because of its purple flowers. Axseed, on the other hand, is a reference to the plant's seedpods which resembles an ax's head. Coronilla is another synonym for Crown vetch, as it refers to the plant's ability to form a skeleton on the ground. Crown vetch is a powerful and versatile plant that serves several purposes in the agricultural pest control industry.