Thank you Zuzu for your clarifications and the wiki link - - - and there it was!
I'm fascinated by all the information collected in all of the Campanulas. I've just been studying my garden photos of the last summer to see if I have both Campanula rotundifolia and Campanula cochlearifolia.
I love the biennial Campanula patula. It is such a sweetheart how it seeds itself so appropriately.
Thank you again for your good comments.