@article {117, title = {Petasites japonicus en voie de naturalisation dans le sud de la province de Hainaut (Belgique)}, journal = {Dumortiera}, volume = {98}, year = {2010}, pages = {13-22}, chapter = {13}, abstract = {Petasites japonicus is naturalizing in the south of the province of Hainaut (Belgium). Petasites japonicus subsp. giganteus was discovered in a small waste ground (probably an old garden) along a former railway line at Sivry-Rance (Walloon province of Hainaut, Belgium). Only male plants were found. An identification key to the four species of the genus Petasites occurring in Belgium, phenological observations, a description of the habitat of this neophyte, and an overview of records in Belgium are provided. The mode of introduction and its status in Wallonia are discussed.}, author = {Jean-Michel LECRON} }