I think it will be hard to pin down the cultivar. " Vast and varied group (about 300 species) encompassing trailers, creeping or tufted miniatures, and erect kinds 1-6' or taller." Quoted from Sunset Western Garden Book.
I have C.isophylla (Italian bellflower) I think. It has slightly sandpapery leaves. It's a perennial thug in my zone, an indoor/outdoor plant in cold climates.
