Knitbone AKA Comfrey. 
This beautiful salve is an old school doctor prescribed remedy. 
Comfrey has been cultivated as a green vegetable and has been used as an herbal medicine for more than 2,000 years. Comfrey's original name, knitbone, derives from the external use of poultices of its leaves and roots to heal burns, sprains, swelling, and bruises and help relieve muscle and joint pain.