Rosa multiflora
Family: Rosaceae
Invasive Species
This cultivated multiflora rose is found outside the James Cancer Research Hospital with 5 petals, 5 sepals, many stamen, inferior ovary, leaves toothed, netted venation, and alternate ovate leaves.
This one looks more like a cultivated rose species. Take a look and see if the stipules (fused to the petiole) are entire instead of bristly margined/ deeply toothed. Rosa multiflora would have bright red hips this time of year (since it flowers in May – June).