Harebells, Campanula rotundifolia, are one of my favourite summer flowers. What is not to like – a beautiful blue colour and shaped like bells. I have cultivated forms of Campanula in my garden but nothing beats this native one. The native ones are found on dry grasslands and dunes. These ones were growing on a dry sand/soil bank adjacent to some machair (a specialised, rare and sandy habitat formed from windblown calcareous sands) near Belmullet, Co Mayo.