Laurie Campbell / Grass of parnassus (Parnassia palustris) flower, Caithness, Scotland, July

Laurie Campbell / Grass of parnassus (Parnassia palustris) flowers, Caithness, Scotland, July

Laurie Campbell / Grass of parnassus (Parnassia palustris) flowering, Caithness, Scotland, July

Florian Möllers / Grass-of-Parnassus (Parnassius palustris), flower, Berlin, Germany, July

Paul Hobson / Grass of parnassus (Parnassia palustris) in flower Derbyshire, UK

Philippe Clement / Marsh grass of parnassus (Parnassia palustris) in flower, Alps, Switzerland

MYN / Niall Benvie / Grass of Parnassus {Parnasia palustris} Scotland, UK meetyourneighbours.net project

Geoff Simpson / Grass of Parnassus {Parnasia palustris} Peak District NP, UK Derbyshire

Duncan Mcewan / Grass of Parnassus {Parnasia palustris} flowers, Scotland, UK