Milk vetch is a plant native to various regions of the world and is known by several names. One of the most common synonyms is astragalus, which is derived from the Greek word astragalos. This term refers to the plant's use in ancient medicine as a treatment for lung and heart ailments. Other synonyms for milk vetch include locoweed, hoary pea, and goat's-thorn. These names are often used interchangeably depending on the region and the specific species of the plant. In traditional Chinese medicine, milk vetch is known as Huang Qi, and it is used to boost immunity and promote overall wellness. Regardless of the name, milk vetch is a fascinating and important plant with a long history of medicinal use.