1839 Senecio aquaticus Hill subsp. aquaticus

This subspecies is mainly restricted to C. and W. Europe. Fl. Turk. 5/1975, p. 149 reports an isolated occurrence in Turkey-in-Europe (native?). The other subspecies in Europe, subsp. barbareijolius (Wimm. & Grab.) Walt. (syn.: S. erraticus Bertol.), has a somewhat more southerly distribution (cf. Fl. Eur. 4/1976, p. 202). Subsp. aquaticus occurs as an adventive in several places in Fennoscandia.