Epipactis helleborine subsp. orbicularis (K.Richt.) E.Klein, Phyton (Horn) 37: 74 (1997).
Original Compiler: R.Govaerts
This name is Accepted by:
- Govaerts, R. (2003). World Checklist of Monocotyledons Database in ACCESS: 1-71827. The Board of Trustees of the Royal Botanic Gardens, Kew.
- G.I.R.O.S. (2009). Orchidee d'Italia: 1-303. Il Castello srl, Italy.
- Birkedal, S. & Kreutz, K. (2009). Knipprötter i Skåne. Botaniska Notiser 142(4): 1-11.