Photo of Bristly greenbrier (Smilax hispida)
It climbs up other plants by tendrils. A tendril is a filifom spiral shoot that winds around anther body.
This plant does not have ornamental value but could be used as a break. You don't want to touch it without gloves.
Looking on the internet I could not find a photo of it in the wild. There is a lot of it in Missouri.
