I have this.... stuff... growing all over my yard... I'm constantly pulling it off my yew bushes and my rose bushes... the stems and vines are smooth... that is all I can tell you... help me get rid of this pest!
Looks like bindweed?
Of course everything looks like bindweed after battling it in my garden.
Does it wind itself around any vertical stems? If you pull it slowly out of the ground does a few inches of whitish stem come up from below ground? Does it grow extremely fast? If so, then it might be bindweed.
Wanting it gone is the the hard part. Roots of this pest can go down 15 feet or more. I don't think there is any easy answer, other than keep doing what you're doing, constantly pulling it, preferably as soom as it emerges. Plastic mulch helps but it will find tears or gaps in the plastic like a moth finds a flame. I think the deep roots pose a challenge to those who would use chemicals like Roundup on it. A few years of vigilance should weaken the root system enough to make it go away.