Sure--maybe it is Tropicana
Sorry I wasn't clear.
In a previous post I said that I had dug out all of the rootstock of the dead roses. Actually what I did was remove all the dead roses (basically broke them off the rootstock, unwittingly), planted some other things, watered, and accidentally grew a hedge of rootstock plus this orange rose. (same thing in the backyard minus the orange) Then I became disenchanted with the rootstock roses, so I dug out all of the rootstock that was not supporting a surviving graft. I did not dig up the orange rose. That is what I meant by "I couldn't exactly remove the rootstock of the survivor..." I do prune out the rootstock growth when I notice it. And I noticed some in the picture that I posted and felt frustrated.
Although I have planted several grafted HT since starting to garden here, my current mission to plant 'own-root' roses is to spare the future gardener the agony of chasing rootstock out from under other plants.