Here is a list of various campanula (bellflowers) you will find on this page....
Elizabeth
Sarasota or Sarastro
Elizabeth Campanula

takesimana
Clump forming up to 3' tall campanula.
Heart shaped bright green leaves with bell shaped creamy 2-3" long flowers flushed reddish/purple with dark spots on the inside of the bells. Slightly scented.
Clump forming up to 3' tall campanula.
Heart shaped bright green leaves with bell shaped creamy 2-3" long flowers flushed reddish/purple with dark spots on the inside of the bells. Slightly scented.
Sarasota or Sarastro

Two names for same plant.
Punctuata.
18" clump forming campanula.
Reblooming cross between C. punctata & C. trachelium
Punctuata.
18" clump forming campanula.
Reblooming cross between C. punctata & C. trachelium
more flowers

Love its big purple bell shaped flowers!