RugosaB

My son bought a house in Jan and I've been put in charge of id'ing plants.
I'm stumped on this one.
It dies down to NOTHING in the winter (oh yeah, we're in NW Ohio, zone 5)
and now it's 2 1/2 - 3 ft tall and as wide a spread
There're quite a few of them, definitely on the 'give one to Mom' list.
The flowers are about 5-6 inches