862 Ranunculus ficaria L.

Within this polymorphic mainly European species four subspecies are distinguished in Fl. Eur. 1/1964, p. 233 f., with notes on distribution in general. The main distribution of subsp. ficariiformis Rouy & Fouc. is marked on the map. The species has been introduced into eastern N. America. Cf. also Meusel et al. 1965, map p. 168.