Abstract. Delforge, P.- Chlorophyll-less Epipactis helleborine (L.) Crantz in the vicinity of Brussels [Natural. belges 79 (Orchid. 11) (1998): 124-130]. First mentions of Epipactis helleborine without chlorophyll for two of the federated entities of Belgium: the Brussels-Capital region (Uccle) and the Flemish region (Rhode-Saint-Gen¸se). Other recent mentions of that curious abnormality in western Europe are evoked as well as the nomenclatural problem of naming that hypochromy and the assumptions about its origins.
Key-Words: Flora of Belgium. Orchidaceae, Epipactis, chlorophyll-less E. helleborine, hypochromy.