They have calyx and corolla both, and the corolla has separate petals, see; and the ranunculaceae have the petals and sepals deciduous, and the leaves generally cut, as you see these are.
"A Red Wallflower"
Susan Warner
Cattle will not eat the acrid, caustic plant-a sufficient reason for most members of the ranunculaceae to stoop to the low trick of secreting poisonous or bitter juices.
"Wild Flowers Worth Knowing"
Neltje Blanchan et al