Abstract. Évrard, D. & Mast de Maeght, J.- The former racing circuit of Nivelles-Baulers: a very interesting Orchid station in the Brabant Wallon (Belgium) [Natural. belges 90 (Orchid. 22) (2009): 39-45]. Nivelles is a small Belgian city, 30 km south of Brussels. A racing circuit was created there in 1968 and stopped its activities in 1974 because it was bankrupt. It was set up on an 80 ha (200 acres) plot of land, three quarters of which have since been converted into a business park. The last quarter (20 ha = 50 acres) was left unattended and nature allowed running free. Since then 7 different species of orchids appeared on these grounds: Epipactis palustris, E. helleborine, Neottia ovata, Dactylorhiza fuchsii, D. praetermissa var. praetermissa, D. praetermissa var. junialis, Anacamptis pyramidalis, and Ophrys apifera. This is a most remarkable result in such a region of intensive farming and it’s the only known growing spot in the Brabant Wallon province of E. palustris, a rare and regressing species in Belgium. Hopefully, some kind of protection status will be found to preserve the natural patrimony of the former Nivelles racing circuit and its impressive collection of orchids.

Key words. Flora of Belgium, Brabant Wallon, Nivelles; Orchidaceae, Epipactis palustris, E. helleborine, Neottia ovata, Dactylorhiza fuchsii, D. praetermissa var. praetermissa, D. praetermissa var. junialis, Anacamptis pyramidalis, Ophrys apifera.