Melilotus officinalis, or yellow sweet clover (also known as melilot) is an annual/biennial and part of the leguminosae family. Growing to 1.2m tall, sweet clover flowers in the summer through early fall. It can be found in grassy fields and roadsides and cannot grow in the shade or acidic soils.
Used internally or externally sweet clover can treat varicose veins and hemorrhoids, though long-term usage is needed for the effects to be realized. It can also be used externally to treat eye inflammations, severe bruising, and swollen joints. A water distilled from the flowering tops is useful in treating conjunctivitis. The roots, young shoots, and leaves can be eaten cooked. However, caution should be exercised as the dried leaves are toxic and should not be consumed. The dried leaves, however, can be used as an insect repellent and work quite well as a mode of keeping moths out of clothing.