[Salix alba] Bitter, digestive herb, with the bark being the potent part. Famous for being the original source of salicylic acid (the precursor to aspirin), but unlike aspirin, it does not thin the blood. Used for thousands of years to relieve joint pain and to manage fevers. An excellent remedy for arthritic and rheumatic pain affecting joints such as hips and knees, and also the back. It relieves inflammation and swelling, improving mobility in aching, painful joints. Available in bark form or as a powder.