It's really difficult to see in these photos and clicking on them only makes them smaller. If possible, could we please see a sharper image of the bloom and of the foliage? How big are the blooms? Are they typically in small clusters or large ones?
Did someone buy this rose or has it always been there? I ask because if there's a possibility that it's a species or wild rose, the arching habit reminds me of many multifloras, such as this one:
http://www.helpmefind.com/rose...