Potentilla simplex, also known as common cinquefoil or old-field five-fingers or oldfield cinquefoil, is a perennial herb in the Rosaceae (rose) family native to eastern North America from Ontario, Quebec, and Labrador south to Texas, Alabama, and panhandle Florida.Potentilla simplex is a familiar plant with prostrate stems that root at nodes, with yellow flowers and 5-parted palmately pinnate leaves arising from stolons (runners) on separate stalks. Complete flowers bearing 5 yellow petals (about ...