Folk medicine plant is a term used to describe plants that have been used for centuries to treat various ailments. The two crossword solutions for this term are 'HERB' and 'boneset'. HERB is a general term used to describe any plant with leaves, stems, or flowers that are used for flavoring, medicinal, or aromatic purposes. Boneset is a specific type of HERB that has been used for centuries to treat fever, colds, and flu-like symptoms.