Well. I think I have the right rose, but there is one cane that has shot up and has no blooms on it, and the shorter canes on the ground have single white with pale peach buds, and a yellow boss. Those are lightly fragrant of orange blossom, and rose. It really is a pretty thing even though it is a rose that supposedly blooms once, and sends out masses of roots. When I researched it I found it was part of the R. canina group, so we have a few decisions to make.

If the aerial cane is the true R. Marschalliana Sosn. then maybe I'll have to wait until it blooms next year, I don't see any buds on it, I can't remember if I read that it blooms on old wood.

A cached page for ForestFarm's R. marschalliana Sosn. shows a small white shingled rose. ForestFarm was given the seeds by a couple from Hungary who are plant hunters in the Mediterranean, and Eurasian areas. Further reading of botanical entries indicate this rose is one of many similar roses-all being hybrids of very ancient breeding-some dating back to the Greeks, others to the Middle Ages and are found near ruined temples and old churches. Most are once blooming, and have colonizing habits.