Ranunculus acraeus, more commonly known as Alpine Buttercup, is a species of the buttercup family, Ranunculaceae, found in New Zealand. This rare and native species of the buttercup strictly grows on an alpine habitat therefore its name Ranunculus acraeus. The genus Ranunculus includes buttercups and acraeus means 'on high.' The plant grows about half a meter in width and is covered in beautiful, bright yellow flowers. It may be mistaken for the R. piliferus but research has shown the R. acraeus to be its own distinctive species. This species of buttercup is endemic to high altitudes.