Codonopsis
John Bryan (Tue, 29 Aug 2006 09:55:44 PDT)

Dear Mark:

Thanks for your message, you might be correct but Codonopsis lanceolata
according to the RHS is spotted and striped violet within and flowers in
the autumn. While C. convolvulacea, hardy to zone 5, is azure to
violet blue without stripes. How high is your plant? Thanks for the
leads to the websites. Cheers John