Epipactis palustris, the marsh helleborine,[2] is a species of orchid native to Europe and Asia.

In the typical form, the sepals are coloured deep pink or purplish-red, the upper petals shorter and paler.

[3] Variants without most of the reddish colours of the typical form have been called E. palustris var. ochroleuca.

[7] Epipactis palustris is typically found in humid woodland and grassland, as well as in marshes, dune slacks and bogs.

It prefers a calcareous substrate with a basic pH, low nutrient availability and medium wet.