The picture shoes a buttercup flower with five shiny yellow petals and many stamens and pistils. Most of the green leaves are three-lobed. The buttercup family (Ranunculaceae) includes various species with these features such as the desert buttercup (Ranunculus cymbalaria) and the sagebrush buttercup (Ranunculus glaberrimus). Faced with a genus of over 600 species, taxonomic classification is best left to the expert, a ranunculacologist I assume.