My house was built on a spot where patch of woods had just been cleared, I have fought a battle with the green briar coming up in my flower beds since I moved here. Poisons only kill a small portion of the vines that are above ground, yesterday I started digging down from the sprouts to try to dig up the root systems and found they have a potato like tuber under the ground that acts like a mother ship for future sprouts.
I have never seen a reference to anyone eating these tubers but in a food crunch (that may be coming) these could be a starch rich source of food.
My land is covered up with green briars, no telling how many tubers there are in an acre.
Anybody know if these tubers have any food value or are safe to eat? some of them are quite large, like your fist.