purple verbena flowers for alternative herbal medicine

verbena vervain vervaine purple flower herb floral flowers plant lilac herbal medicine food medicinal edible aromatherapy sedative fresh botany natural alternative remedy anxiety cure relief stress tranquilizer insomnia ingredient mortar sleep aid healthcare homeopathic preparation preparing wildflower decoration naturopathic naturopathy homeopathy old fashioned apothecary essence problem inflammatory healing antioxidant brazilian background bonariensis