What is "platycodon"

Platycodon grandiflorus (from Ancient Greek "wide" and "bell") is a species of herbaceous flowering perennial plant of the family Campanulaceae, and the only member of the genus Platycodon. It is native to East Asia ( China, Korea, Japan, and the Russian Far East). It is commonly known as common balloon flower or balloon flower (referring to the balloon-shaped flower buds), and, depending on the region, Korean bellflower, Chinese bellflower, or Japanese bellflower.