You have a species of _Smilax_, commonly called Greenbriar or
Catbriar. Despite the broad leaves, it's a monocot. The vines are the
botanical equivalent of barbed wire. These things often grow from
large underground tubers. If you can get those up, you will have much
less trouble controlling it. Keep hacking at it, and paint the
severed stems with Roundup.
The very young shoot tips of _Smilax_ are often edilbe and tasty.
Gives you a way to get back at the darned stuff!
>> Hi All,
>> We have a thorny vine growing along our border (fence) that has proven to be
> very persistent over the years. It wraps itself around our lilac bushes and
> has a very strong root system (somewhat like a rhizome [horizontal runners]-
> where it networks and reproduces itself underground). I removed most of
> these vines (what I informally call "the vine from hell") yesterday and have
> included two jpegs for help in identifying this vine. Normally this plant is
> vertical but since these were extracted yesterday, these are the postmortem
> pics. The leaves are waxy and the stalks are strong. The roots are strong
> and well developed. As opposed to previous years, I tried to be more
> thorough and remove these large root masses. I had to use a large shovel and
> a digging bar to do this!
>> The locale involved is Virginia.
>> Thanks in advance for any help or attempts to identify this vine.
>> Regards, Andre