Author 'Chasseur de temps' (Id 118349 ) : "Great Giant hogweed - Last honored by the artists of Art Nouveau movement of the Ecole de Nancy umbelliferous this had all the qualities required to inspire carpenters, glaziers, architects, sculptors and other artisans of the ironwork of Art. Its large size (4 to 5m in height) and 50cm diameter flowers would impose as a centerpiece in floral decorations. Yet! Attention DANGER!. The Great Giant hogweed is actually a pest plant. Invasive, it colonizes all areas where we have the misfortune of introducing and binding on the expense of other species. Moreover, it is terribly stinging and causes burns on skin with which it came into contact for a few hours earlier. Note that the hives can appear repeatedly even after treatment!