Potentilla spp.; cinquefoil  [Rosaceae]  Several species of small to moderate sized, weak-stemmed perennials with 5-petaled yellow flowers that look somewhat like those of buttercups.  The common name means "5 leafed", a reference to the typically 5-parted, palmately compound leaves, but species with fewer and more leaflets occur.  Fields and open woods, with various species flowering from spring through summer.  Some Wisconsin species are native, others introduced, and many horticultural varieties are available.  [073]