Does it have bluish foliage? How tall does it get? Is it prone to sucker? Does it set hips? I wonder if it might be 'Queen of Denmark'. A shot of the canes might be helpful.

My first thought was a Centifolia of some kind, but since I'm not really au fait with the old European garden roses, others may well laugh at this suggestion. It's very lovely indeed, whatever it is.

When you say it's taking over your garden, do you mean it's suckering? It would probably also help to know the size of the plant as a whole, and of the blooms in particular. I don't think it's a rootstock. :-)

ETA: Cross-posted with Melissa's (far more educated) suggestion.

Konigen von Danemark

Thanks to everyone for the information!

The foliage is a lovely bluish green. It grows to about 4' tall, rather upright and even stiff (this could be from years of not pruning). Canes can measure up to 5' in length but no longer. Bloom size average is 3" across. Suckers profusely. It has taken over more than 100 sq. ft of garden. It does set hips. Attached are photos of young cane & older (apologies for the fuzzy shots). I live in northeast USA. Clay soil, lots of moisture. Roses are happy if not too much rain, so the vigor may have as much or more to do with conditions than genetics. (?)

One more thing: I found a note that at one time, "Jacques Cartier" was planted in the area (grafted).

Thanks again!

Thank you, Carol and Paul. I have been wondering for years what this rose was! I never ordered a Konigen von Danemark, so I think the "Jacques Cartier" I planted 20 years ago was mislabeled. (It never behaved like JC - no repeat bloom, etc. so this makes sense).

I sure hope my KvD starts to travel one day. My two plants, one grafted, one own root, in place for years, have steadfastly stayed where I planted them, much to my regret.

Oh man, that rose could take over my garden any day!! lol.. its really gorgeous!

Well, well, Crachel Marley, it would seem that a rose wholesaler switched labels, not in itself unusual, alas, on a fairly large group of roses. You got the JC which was really KvD and I and some other folks in CA got the KvD which was really JC. People in the rose society were convinced that KvD is remontant, never mind two centuries of testimony from rosarians and rose growers that it is not.

Gee, why can't my "weeds" look like that?