Buttercups Screensaver - Version 1.0 The free flower screensaver, Buttercups, contains 33 high quality images of Buttercups in bloom. Anemone is a genus of about 120 species of flowering plants in the buttercup family Ranunculaceae in the north and south temperate zones. They are closely related to Pasque flower (Pulsatilla) and Hepatica (Hepatica); some botanists include both of these genera within Anemone.