There are many different types of wild roses in the world. One that is native to our part (the Canadian west coast) is the Nootka Rose. Wild roses have 5 petals, the domestic varieties tend to have multiple layers of petals. The Nootka Rose has particularly big, showy flowers (4 to 8cm in diameter) and it doesn't have nasty thorns! (Well, not very many!)
There is a little drama happening just below the rose in the picture. A spider has trapped a wasp and it is attempting to have lunch.