Also Known as American Vervain, False Vervain, Vervain, Simpler's Joy, Indian Hyssop, Wild Hyssop, Traveler's Joy, and Purvain. Known as a natural tranquilizer. Used for insomnia, nervous disorders, elimination of intestinal worms, expectorant, diaphoretic, antiperiodic, tonic, emetic, vulnerary and vermifuge. Used externally heals wounds and sores