Cinquefoils are a group of flowering plants in the genus Potentilla and the family Rosacdeaa, rose. There are many different cinquefoils found in different places around the world. Many cinquefoils have five petal flowers. Many resemble strawberry plants but the cinquefoil have inedible fruit.
Here in Minnesota we see about five different types of cinquefoil. Some, like shrubby, common and rough cinquefoil are native to the area. Other species, like sulphur and silver cinquefoil are invasive species. I believe that these photos are of the invasive sulphur cinquefaoil and they were taken at the Rice Lake National Wildlife Refuge.