Rosa palustris, or the Swamp Rose is a native rose species found in most of eastern North America. It grows along streams and swamps in lightly acidic wet to moist soil.
As you can see, the flower looks similar to our garden rose, but is certainly not showy. The number of petals are limited (5) and arranged blandly. It takes lots of selective breeding to go from a wild rose to our splendid garden roses.