Any of several plants of the genus Caltha, especially C. palustris, growing in swampy places and having bright yellow flowers. Also called cowslip. Perennial herbaceous plant (Caltha palustris) of the buttercup family, native to wetlands in Europe and North America. It is grown in boggy wild gardens. The plant has a hollow stem, heart-shaped or round leaves, and glossy pink, white, or yellow flowers composed solely of sepals (petals are absent). The stems, leaves, and roots are sometimes cooked and eaten as a vegetable, though the fresh plant is poisonous. See also cowslip
perennial plant of the buttercup family native to the marshes of North America and Europe