| Orchidaceae | |
Epipactis muelleri subsp. cerritae
| M.P. Grasso | Orchidee (Hamburg) 2: 4 | 1994 |
| Orchidaceae | |
Epipactis muelleri var. cleistogama
| (C. Thomas) P.D. Sell | Fl. Great Brit. Ireland 5: 364 | 1996 |
| Orchidaceae | |
Epipactis muelleri var. dunensis
| (T. Stephenson & T.A. Stephenson) P.D. Sell | Fl. Great Brit. Ireland 5: 364 | 1996 |
| Orchidaceae | |
Epipactis muelleri var. lapidocampi
| (E. Klein & Laminger) Kreutz | Ber. Arbeitskreisen Heimische Orchideen 24(1): 158 | 2007 |
| Orchidaceae | |
Epipactis muelleri var. leptochila
| (Godfery) P.D. Sell | Fl. Great Brit. Ireland 5: 364 | 1996 |
| Orchidaceae | |
Epipactis muelleri subsp. muelleri
| | | |
| Orchidaceae | |
Epipactis muelleri var. peitzii
| (H.Neumann & Wucherpf.) P. Delforge | Naturalistes Belges 78: 246 | 1997 |