This buttercup with a Mediterranean-Turanian distribution is present in Liguria and in all the regions of Central and Southern Italy except in the Marche, but is more common along the Tyrrhenian side of the Peninsula and in Sardinia. It grows (despite the name) in dry meadows on clay soils derived from limestone or calcium-rich marl substrata, from sea level to about 800 m. The species is common in the outer belt of the Sardinian temporary ponds, in contact with dry grasslands. The fresh parts are poisonous (protoanemonine). The genus name, the Latin for 'little frog', was used since ancient times only for the aquatic species of the subgenus Batrachion, also a diminutive of the Greek 'batràchos' (frog); the species name, which means 'of the marshes', is rather incongruous, considering the ecology of the species. Flowering period: April to May.

Italian name(s): Ranuncolo flabellato (Italia), Ranuncolo paludoso (Italia).