Please excuse if this is posted in the wrong area... I don't often travel to this side of the forum, lol! I'm having trouble identifying this plant, so hopefully experts here can help.

A few summers ago, I plants 3 spreading roses. One has done okay (1st pic) but the middle one has become this strange looking plant (comparatively) with lots of tall shoots (some ~5') and much smaller, lighter, less waxy leaves. It had small white flowers on it for a really brief period in June, but otherwise now if just green and taking over the area. Any suggestions... is this a different plant, and should I move it somewhere else (it can't be a weed, can it?). It's got thorns as well.

Thanks!

{{gwi:312462}}
{{gwi:312463}}