Campanula americana is a common native that tolerates the deep shade of mesic woods but often shows up along trail edges, forested road edges, and near treefalls where a little sunlight gets in. Common in northern Indiana, it's my guess that it's common all over the state, with a possible exception of the prairie counties in the northwest corner. The flowers are attractive and unusual, and if it was a rare plant we'd go crazy over seeing it. At any rate, it's a native and we should enjoy it when we see it. Photographed in rich woods in rural LaPorte County, Indiana.