“Harebells” ( thanks to Vickie Emms for identifying these).
Take in June, atop the windswept and arid grassy embankments of the Old Man River near Lethbridge, Alberta, Canada.
The Harebell (Campanula rotundifolia) is a short to medium, slender, hairless, rhizomatous perennial in the bellflower family Campanulaceae.
Harebells flower in late summer between July and October, sometimes into November, and are found on dry, nutrient-poor grassland and heaths in Britain, throughout Northern Europe and in North America. Once established, the plants compete with tall grass, but the minute seedlings need a clear space in which to establish. The plant often successfully colonises cracks in walls or cliff faces, but is also prominent in dunes.