Sur la présence d'Euphorbia segetalis en Belgique

On the presence of Euphorbia segetalis in Belgium. The presence since 2018 of Euphorbia segetalis, a strictly Mediterranean species, in a vegetable garden in Rixensart (Walloon Brabant) raises a number of questions, first and foremost regarding its origin and ecology. The discovery in 2022 of a second population of this species in the Pays de Herve (province of Liège) sheds new light on a possible local naturalization in our country. The infraspecific variation of this species is also discussed.