White Papers & ReportsBlue vervain is also known as Verbena officinalis, American Blue Vervain and Simpler’s Joy. It is in the Verbenacea plant family. Blue vervain is indigenous to the United States, flowers during the summer months, and is typically found in tall grassy fields and along roadsides. The King’s American Dispensatory historically listed this perennial plant for use as tonic, emetic, expectorant, and sudorific. A sudorific is a substance that causes or increases sweating. Eclectic Physician Dr. John Scudder included blue vervain in the classic text: The American Eclectic Materia Medica and Therapeutics, 1898. He listed its traditional use for colds, coughs and other issues affecting the respiratory organs as well as its use for “obstructions of the glandular system”. It has also been used over the course of time to ease tension and support a healthy mood. Blue vervain is a tall (3-4 feet), slender, elegant, perennial plant with opposing leaves, which are lobed and serrated in shape and have small purplish-blue flowers.