Harebell is a native species, common in the eastern part of the country. It is hardy and floriferous and can tolerate some shade, as one of it's native habitats are deciduous forests. It has a large distribution area in the northern hemisphere and there is quite a bit of variation in flower shape and size of the flower clusteres. I've had a few plants of different origin that were very variable. The one pictured was grown from seed and is quite different from the Icelandic variety, which has narrower flowers in sparser clusters.