purple verbena flowers for herbal medicine

verbena vervain vervaine flower plant purple lilac herbal medicine edible floral flowers nature herb natural mortar alternative remedy medicinal sedative anxiety relief stress food tranquilizer tranquilizing cure sleep aid aromatherapy healthcare preparation preparing ingredient decoration naturopathic holistic ayurveda drug healing traditional health care homeopathic naturopathy homeopathy essence antiinflammatory antioxidant background bonariensis color