It's interesting that they look just like prairie rose.
Pasture rose-It is possible to confuse Carolina rose with leafy rose (Rosa foliolosa). A greater number of prickles, longer stipules, longer petioles, and a leaflet length-width ratio of 2-1 are characters for distinguishing Carolina rose.
Prairie rose-Rosa arkansana (Prairie Rose or Wild Prairie Rose; syn. R. pratincola, R. suffulta, R. suffulta var. relicta) is a species of rose native to a large area of central North America, between the Appalachian and Rocky Mountains from Alberta, Manitoba, and Saskatchewan south to New Mexico, Texas and Indiana. There are two varieties:
Rosa arkansana var. arkansana
Rosa arkansana var. suffulta (Greene) Cockerell
The name Rosa arkansana comes from the Arkansas River in Colorado. The species' wide distribution and consequent genetic drift has led to an extensive synonymy.
The name Prairie Rose is also sometimes applied to Rosa blanda, also known as the Meadow Rose or Smooth Rose, which is also widely spread, but somewhat further to the north.