Lesser Celandine (Ranunculus ficaria) also known as: Pilewort and Fig Buttercup.  Division - Magnoliaphyta Class - Magnoliopsida Subclass - Magnoliidae Order - Ranunculales Family - Ranunculaceae Genus - Ranunculus  This is generally a more suburban weed, not common in the inner city.    Taxonomic List List by Scientific Name List by Common Name |