Small-Flowered Buttercup (Ranunculus abortivus) also known as: Littleleaf Buttercup, Small-Flower Crowfoot and Kidneyleaf Buttercup Division - Magnoliaphyta Class - Magnoliopsida Subclass - Magnoliidae Order - Ranunculales Family - Ranunculaceae Genus - Ranunculus Weeds Taxonomic List List by Scientific Name