butterflower

Cuckoobud \Cuck"oo*bud"\ (k??k"??-b?d`), n. (Bot.) A species of Ranunculus (Ranunculus bulbosus); -- called also butterflower, buttercup, kingcup, goldcup. --Shak. [1913 Webster]

Buttercup \But"ter*cup`\, n. (Bot.) A plant of the genus Ranunculus, or crowfoot, particularly Ranunculus bulbosus, with bright yellow flowers; -- called also butterflower, golden cup, and kingcup. It is the cuckoobud of Shakespeare. [1913 Webster]

butterflower \butterflower\ n. any of various plants of the genus Ranunculus.