World Checklist of Selected Plant Families (WCSP)

Epipactis helleborine var. densiflora Verm., Ned. Kruidk. Arch. 56: 241 (1949).

This name is a synonym.

Accepted Name:	Epipactis helleborine subsp. helleborine.
Family:	Orchidaceae
Original Compiler:	R.Govaerts