Comfrey, Symphytum officinale. Its traditional names of knitbone, boneset, and the derivation of its Latin name (from the Greek symphis, meaning growing together of bones, and phyton, a plant), speak to its longstanding reputation as a therapeutic herb. It was historically used to treat bronchial problems, broken bones, sprains, arthritis, gastric and varicose ulcers, severe burns, acne. It was reputed to have bone and teeth building properties in children, and to treat many female…