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|Noun||1.||butter-flower - any of various plants of the genus Ranunculus|
meadow buttercup, Ranunculus acris, tall buttercup, tall crowfoot, tall field buttercup - perennial European buttercup with yellow spring flowers widely naturalized especially in eastern North America
common buttercup, Ranunculus bulbosus - perennial Old World buttercup with golden to sulphur yellow flowers in late spring to early summer; naturalized in North America
creeping buttercup, creeping crowfoot, Ranunculus repens - perennial European herb with long creeping stolons
celery-leaved buttercup, cursed crowfoot, Ranunculus sceleratus - annual herb growing in marshy places