The term 'Plant of the Buttercup Family' refers to three plants: ANEMONE (7 letters), ACONITE (7 letters), and Marshmarigold (13 letters). ANEMONE is a genus of flowering plants in the buttercup family, Ranunculaceae. ACONITE is a genus of flowering plants in the buttercup family, Ranunculaceae, and is also known as wolfsbane or monkshood. Marshmarigold is a species of flowering plant in the buttercup family, Ranunculaceae, and is also known as kingcup or cowslip.