Question: what roots are used for medicine?
Answer: Chamomile. (Flower) Considered by some to be a cure-all, chamomile is commonly used in the U.S. as ananxiolytic and sedative for anxiety and relaxation. ... 
Echinacea. (Leaf, stalk, root) ... 
Feverfew. (Leaf) ... 
Garlic. (Cloves, root) ... 
Ginger. (Root) ... 
Gingko. (Leaf) ... 
Ginseng. (Root) ... 
Goldenseal. (Root, rhizome)