The term Digitalis Source is an 8-letter word, which is the answer to a crossword puzzle. The correct answer is FOXGLOVE, which is a genus of flowering plants in the family Plantaginaceae. FOXGLOVE is native to Europe, western and central Asia, and northwestern Africa. It is also widely naturalized in many places, including North America. The plant has been used for centuries as a medicinal herb, and its active ingredients are used in modern medicine to treat heart conditions.