The Medford Public Library presents "Plants Go to War: A Botanical History of World War II," an online program with botanist and author Judith Sumner. In a blend of botanical and military history, Sumner will talk about the surprising and crucial role of plants in World War II.  From victory gardens to drugs, timber, rubber, and fibers, plants supplied materials with key roles in victory. Sumner has been the lecturer-in-residence at the Star Island Natural History Conference in New Hampshire,…