Lobelia siphilitica L. (N-Am.) – A very rare and probably always ephemeral escape from cultivation. First collected around 1930 in an estate in Jette (as Campanula spec.). More recently also seen in Achel in the valley of riverlet Warnbeek in 2004 and by a path in an abandoned camping near Mol in 2008. In 2011 also seen in Dorinne (Yvoir).
Taxonomic name: