Seeds of this lovely vine Codonopsis lanceolata. Codonopsis lanceolata is a perennial, twining vine in the bellflower family. It typically grows to 10-15′ tall but dies back to the ground each winter. Features greenish, nodding, bell-shaped flowers (to 1.25″ long) with pale bluish-purple shading on the outside and with violet spotting and/or striping inside. Blooms in late summer. Elliptic-ovate green leaves (2-3″ long) are clustered at the branch ends. Roots of this Asian native vine are commonly used in Korean cooking. Plants in the genus Codonopsis are sometimes commonly called bonnet bellflower. Easily grown in average, medium, well-drained soils in full sun to part shade. Prefers sandy loams. Winter hardy to USDA Zone 6, so it is advisable to grow this vine in a sheltered location with a winter mulch in the St. Louis area Zone 5b to 6a.