Southern Harebell, a native species, has been added to the USWildflowers database (07/28/2010.)  Scientific name is Campanula divaricata. Southern Bellflower, and Southern Bluebell.  Photo below was taken along the Blue Ridge Parkway near the Pisgah Inn, on 07/12/2010.

Southern Harebell, Small Bonny Bellflower – Campanula divaricata