Hi, could you please correct some misidentifications in your plant database?
The photo in Campanula saxifraga is actually of Campanula rotundifolia.
None of the photos posted under Campanula medium var. calycanthema are actually of this variety; they are simply Campanula medium, but not var. calycanthema. Var. calycanthema has a coloured bract at the base of the flower which forms the "saucer" of the "cup and saucer". A very common mistake, which is unfortunately propagated by seed vendors who incorrectly describe the regular canterbury bells that they are selling as "cup and saucer".
Thanks,
growitall
