is a specific kind of: magnoliid dicot genus.

has as a member: butter-flower, buttercup, butterflower, crowfoot, goldcup, kingcup | Ranunculus aquatilis, water buttercup, water crowfoot | lesser celandine, pilewort, Ranunculus ficaria | lesser spearwort, Ranunculus flammula | Ranunculus glaberrimus, sagebrush buttercup | greater spearwort, Ranunculus lingua.

is a member of: buttercup family, crowfoot family, family Ranunculaceae, Ranunculaceae.