Ranunculus cortusifolius, also known as the Azores buttercup or Canary buttercup, is a plant species in the genus Ranunculus, family Ranunculaceae. It grows on moister sites throughout the Canary and Azores Islands but is widely cultivated elsewhere as an ornamental. There are reports of it having become naturalized in parts of California. The plant has palmately lobed leaves and showy yellow flowers.