Delforge, P. 2016.- Que devient un individu robuste d'Epipactis helleborine (L.) Crantz. après une transplantation réussie ? Implications pour le statut d'Epipactis helleborine var. minor Engel. et d'Epipactis helleborine subsp. moratoria A. Riechelmann & A. Zirnsack. Natural. belges 97 (Orchid. 29): 89-124.

Abstract. Delforge, P. 2016.- What has become of a robust individual of Epipactis helleborine (L.) Crantz. after a successful transplantation ? Implications for the status of Epipactis helleborine var. minor Engel and Epipactis helleborine subsp. moratoria A. Riechelmann & A. Zirnsack. Natural. belges 97 (Orchid. 29): 89-124. The history and the context of the descriptions of two spindly and rather late taxons, Epipactis helleborine var. minor Engel and Epipactis helleborine subsp. moratoria A. Riechelmann & A. Zirnsack, are evoked. The two taxons are controversial, considered in turn (1) as falling in the range of variation of E. helleborine s. str., (2) as synonyms but distinct from E. helleborine s. str. or (3) as two “good” and distinct (morphological) subsp. or (biological ?) spp. It is demonstrated that the characters put forward for the distinction of “minor”and “moratoria” in comparison with E. helleborine s. str. are not diagnostic. Five years of observations of a robust individual after a successful transplantation has shown that the spindly or robust aspect of the whole plant, the number of leaves and flowers, the timing of flowering, the colour more or less strong of the flowers, and the pending or horizontal position of the fruiting capsules are morphological expressions of E. helleborine s. str. This morphological expressions depend notably on the effectiveness of the mycorrhiza, an important component of the mixotrophic Epipactis autecology.

Key-Words:
Orchidaceae, Epipactis, Epipactis helleborine, Epipactis helleborine var. helleborine f. minor (Engel) P. Delforge, Epipactis helleborine var. minor Engel., Epipactis helleborine subsp. minor (Engel) Engel, Epipactis helleborine subsp. moratoria A. Riechelmann & A. Zirnsack, Epipactis moratoria (A. Riechelmann & A. Zirnsack) A. Riechelmann & A. Zirnsack, Epipactis helleborine (L.) Crantz nsubsp. zirnzackiana A. Riechelmann, Epipactis × zirnzackiana (A. Riechelmann) A. Riechelmann. Taxonomy.