Ranunculus

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 236

Sect. Xanthobatrachium (Prantl) Ovcz . Like Sect. Flammula but submerged leaves with filiform verticillate segments; flowers 3-6 mm in diameter, yellow; achenes less than 1 mm; beak almost absent.