Caltha L.

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 : 211

10. Caltha L. 1

Perennial herbs with more or less cordate leaves. Inflorescence a few-flowered corymbose cyme. Perianth-segments 5 or more, yellow. Honey-leaves absent; carpels nectar-secreting. Stamens numerous. Follicles 5-15.