Synonyms
Epipactis peitzii var. sancta P.Delforge
Helleborine latifolia var. dunensis (T.Stephenson & T.A.Stephenson) Soó
Epipactis leptochila subsp. sancta (P.Delforge) Kreutz
Helleborine leptochila var. dunensis (T.Stephenson & T.A.Stephenson) Druce
Helleborine viridiflora f. dunensis T.Stephenson & T.A.Stephenson
Epipactis sancta (P.Delforge) P.Delforge
Epipactis muelleri var. dunensis (T.Stephenson & T.A.Stephenson) P.D.Sell