Kidney-leaved, or littleleaf buttercup (Ranunculus abortivus)

Member of the Buttercup (Ranunculaceae) family.  Found in various habitats during March - July, grows 6 to 24 inches.   Flowers have 5 petals, equal to or shorter and narrower than the sepals, yellow.  Unlobed basal leaves with rounded teeth mostly broader than long, resembling a kidney.  Stem leaves usually deeply 3-5 lobed.

To learn more about Kidney-leaved buttercup (Littleleaf buttercup), visit its profile at the USDA Plants Database