Codonopsis bomiensis (previously listed as Codonopsis sp.)

We haven't yet flowered this twining Campanula relative which we received as seed labeled Codonopisis - Royal Botanic Garden Edinburgh form. RBGE is Mecca for plantspeople with one of the finest collections of plants in the world. This is a herbaceous vine to 6' with likely blue flowers. Zone 6 at least.

Ok, update as of this summer 2016. This has pale yellow-green flowers netted heavily with purple veins and variable leaves ranging from ovate to ovate-lanceolate with leaf margins all over the map running from serrate to crenulate, entire to lobed. Historically this has been regarded as Codonopsis rotundifolia var. angustifolia but Hong in his recent taxonomic revision of the genus now places this in the new species, C. bomiensis. Fits perfectly with his description and photos in the monograph and our thanks to Bob Armstrong for assisting us with identification. Native to China and Tibet, zone 6 for sure and very likely lower.