Paul Harcourt Davies / Marsh helleborine (Epipactis palustris) in flower, Sibillini, Umbria, Italy. July.

Paul Harcourt Davies / Marsh helleborine (Epipactis palustris) in flower, Sibillini, Umbria, Italy. July.

Will Watson / Marsh helleborine (Epipactis palustris), Herefordshire, England, July

Andy Sands / Marsh helleborine (Epipactis palustris) close up of two flowers showing front view, Hertfordshire, England, UK, June . Focus stacked image

Andy Sands / Marsh helleborine (Epipactis palustris) close up of two flowers showing side view, Hertfordshire, England, UK, June . Focus stacked image

Bernard Castelein / Marsh helleborine (Epipactis palustris) flowers, Groot Schietveld, Wuustwezel, Belgium, June.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) with Arctiid caterpillar (Arctidae) Hole, Norway, July.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) with Arctiid caterpillar (Arctidae) Hole, Norway, July.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) with Arctiid caterpillar (Arctidae) Hole, Norway, July.

Ole Jorgen Liodden / Marsh helleborine (Epipactis palustris) close up of flower, Hole, Norway, July.

Colin Varndell / Marsh helleborine (epipactis palustris) in flower, Dorset, UK, July.

Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) in flower, uncommon species,Castelfiori, Umbria, Italy, June.

Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) in flower, uncommon species,Castelfiori, Umbria, Italy, June.

Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) in flower, uncommon species, Castelfiori, Umbria, Italy, June.

Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) wetland species, near Castelfiori, Orvieto, Umbria, Italy, July.

Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) wetland species, near Castelfiori, Orvieto, Umbria, Italy, July.

MYN / Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) in flower Castelfiori, Umbria Italy, June. Meetyourneighbours.net project

MYN / Paul Harcourt Davies / Marsh Helleborine (Epipactis palustris) in flower Castelfiori, Umbria Italy, June. Meetyourneighbours.net project

Visuals Unlimited / Marsh Helleborine Orchid (Epipactis palustris), Italy

Ross Hoddinott / Marsh helleborine (Epipactis palustris) close up of flowers, Braunton Burrows, Devon, UK, July.

Ross Hoddinott / Marsh helleborine (Epipactis palustris) close up of flowers, Braunton Burrows, Devon, UK, July.

Ross Hoddinott / Marsh helleborine (Epipactis palustris) close up of flowers, Braunton Burrows, Devon, UK, July.

Ernie Janes / Marsh helleborines (Epipactis palustris) in flower with Banded snail (Cepaea) on stem, Norfolk, UK, June

Steve Nicholls / Marsh helleborine (Epipactis palustris) flowering in wetlands, Somerset, UK, July

Steve Nicholls / Marsh helleborine (Epipactis palustris) flowering in wetlands, Somerset, UK, July

Russell Cooper / Marsh Helleborine (Epipactis palustris) in flower, East Kent, UK

Paul Harcourt Davies / Marsh helleborine (Epipactis palustris) close up of flower, Italy

Paul Harcourt Davies / Marsh helleborine (Epipactis palustris) flowering beside pond, Italy

Robert Thompson / Fragrant orchid (Gymnadenia conopsea) and Marsh helleborine (Epipactis palustris) flowering in meadow, Northern Ireland, UK

Wild Wonders of Europe / Bartocha / Marsh helleborine (Epipactis palustris) in flower, H??ege, M??Denmark, July 2009 WWE BOOK. WWE INDOOR EXHIBITION

Robert Thompson / Marsh helleborine {Epipactis palustris} flowers, The Bull NNR, Dublin, Republic of Ireland, July

Robert Thompson / Marsh helleborine {Epipactis palustris} flowers, The Bull NNR, Dublin, Republic of Ireland, July

Robert Thompson / Marsh helleborine {Epipactis palustris} flowering in grass, The Bull NNR, Dublin, Republic of Ireland, July

Wild Wonders of Europe / Geslin / Marsh helleborine {Epipactis palustris} in flower, Central Moldova, July

Wild Wonders of Europe / Bartocha / Marsh helleborine (Epipactis palustris) in flower, H??ege, M??Denmark, July 2009

Wild Wonders of Europe / Bartocha / Marsh helleborine (Epipactis palustris) fowers, H??ege, M??Denmark, July 2009

Gary K. Smith / Marsh Helleborine {Epipactis palustris} flowering in disused quarry, Norfolk, UK, July

Gary K. Smith / Marsh Helleborine {Epipactis palustris} flowering in disused quarry, Norfolk, UK, July

Gary K. Smith / Marsh Helleborine {Epipactis palustris} close up of flower head, Norfolk, UK, July

Gary K. Smith / Marsh Helleborine {Epipactis palustris} mass flowering in disused quarry, Norfolk, UK, July

Gary K. Smith / Early Marsh Orchid {Dactylorhiza incarnata coccinea} Norfolk subspecies, growing with Marsh Helleborine {Epipactis palustris} on coastal dune slacks, Norfolk, UK, July

Philippe Clement / Marsh Helleborine {Epipactis palustris}, De Panne, Belgium

Philippe Clement / Marsh Helleborine {Epipactis palustris}, De Panne, Belgium

Philippe Clement / Marsh Helleborine {Epipactis palustris}, De Panne, Belgium

Philippe Clement / Marsh Helleborine {Epipactis palustris}, De Panne, Belgium

Philippe Clement / Marsh Helleborine {Epipactis palustris} De Panne, Belgium

Paul Hobson / Marsh Helleborine (Epipactis palustris) flowers, Lindesfarne, Northumberland, UK

Robin Chittenden / Marsh helleborine {Epipactis palustris} Norfolk, UK