Prairie trefoil, also known as prairie clover, is a flowering plant that is native to North America. It belongs to the legume family, and it is often used as a forage plant for livestock. While prairie trefoil is a common name for this plant, there are several other synonyms that can be used to describe it. Some of these include purple prairie clover, wild indigo, and lead plant. Each of these names highlights different aspects of the plant's appearance and characteristics. No matter what you call it, prairie trefoil is an important part of many grassland ecosystems and is valued by farmers and conservationists alike.