Nick Upton / Horseshoe vetch (Hippocrepis comosa) flowering in a chalk grassland meadow, Wiltshire, UK, May.

Nick Upton / Horseshoe vetch (Hippocrepis comosa) flowering in a chalk grassland meadow, Wiltshire, UK, May.

Nick Upton / Horseshoe vetch (Hippocrepis comosa) flowering in a chalk grassland meadow, Wiltshire, UK, May.

MYN / Dirk Funhoff / Horseshoe vetch (Hippocrepis comosa) flower, Lorsch, Hessen, Germany. June. Meetyourneighbours.net project

MYN / Dirk Funhoff / Horseshoe vetch (Hippocrepis comosa), Lorsch, Hessen, Germany. Meetyourneighbours.net project

Philippe Clement / Horseshoe vetch (Hippocrepis comosa) in flower showing red and orange early stage, Gran Paradiso National Park, Italy, June

Nick Upton / Germander speedwell (Veronica chamaedrys) flowering in a chalk grassland meadow, with defocused Horsehoe vetch flowers (Hippocrepis comosa) in the background, Wiltshire, UK, May.

Philippe Clement / Horseshoe vetch (Hippocrepis comosa) in flower, Ardennes, Belgium, July

Philippe Clement / Horseshoe vetch (Hippocrepis comosa) in flower, Ardennes, Belgium, July

Wild Wonders of Europe / Giesbers / Clouds surrounding mountains with Horseshoe vetch (Hippocrepis comosa) flowering in the foreground, Liechtenstein, June 2009

Wild Wonders of Europe / Giesbers / Flowering Horseshoe vetch (Hippocrepis comosa) and Globe daisies (Globularia cordifolia) Liechtenstein, June 2009

Wild Wonders of Europe / Giesbers / Flowering Globe daisies (Globularia cordifolia) and Horseshoe vetch (Hippocrepis comosa) double exposure, Liechtenstein, June 2009