Andres M. Dominguez / Heart shaped lip dactylorhiza orchid (Orchis cordigera) in flower, Sierra de Grazalema Natural Park, southern Spain, May.

Paul Harcourt Davies,Paul Harcourt Davies / Elder flower orchid (Dactylorhiza sambucina) in its two colour forms, Campo Imperatore, Gran Sasso, Appennines, Abruzzo, Italy, May

Terry Whittaker / 2020VISION / Southern-marsh orchids (Dactylorhiza praetermissa) Wicken Fen, Cambridgeshire, UK, June

Guy Edwardes / Southern marsh orchid (Dactylorhiza praeternissa) in flower, Arne Heath, Dorset, England, June

Wild Wonders of Europe / Benvie / Southern marsh orchid (Dactylorhiza praetermissa) in flower, Essex, UK, June 2009

Chris Mattison / Roman orchid (Dactylorhiza romana). Troodos Mountains, Cyprus, March.

Michael Hutchinson / Pull focus shot from a Southern marsh-orchid (Dactylorhiza praetermissa) to a pair of Marsh fritillary butterflies (Euphydryas aurinia) mating, Devon, England, UK, June.

Bernard Castelein / Southern marsh-orchid (Dactylorhiza praetermissa) at sunrise, Groot Schietveld, Wuustwezel, Belgium

Andres M. Dominguez / Heart shaped lip dactylorhiza orchid (Orchis cordigera) in flower, Sierra de Grazalema Natural Park, southern Spain, May.

Matthew Maran / Calcareaous grassland including Southern marsh-orchid (Dactylorhiza praetermissa) Grass vetchling (Lathyrus nissolia) Cowslip (Primula veris) Creeping buttercup (Ranunculus repens) East Devon, Englan...

Matthew Maran / Southern marsh orchid (Dactylorhiza praetermissa) growing in calcareous grassland, near the village of Beer, Devon, England, UK, June.

Kim Taylor / Southern marsh orchid (Dactylorhiza praetermissa). Surrey, England, UK, June.