Plant ID (not Malabar spinach)

Does anyone know what this semi-vining (gets long and tall and weaves in and out of a wire fence, but has no tendrils) perennial green is?  The person I originally got it from called it Malabar spinach, but on looking at photos of Malabar spinach (Basella alba/rubra), it appears quite different.  The leaves of this plant are thin (not succulent, as B. albas' are) and pointed, not rounded, and as I mentioned above it has no tendrils and does not curve or twist around its supports.  It is hardy in my Zone 7-8 yard, but dies down after a frost, and does equally well in sun to mostly shade with very little water (though it requires more water in the sun, of course).  I'd love to know what it actually is!

Could it be Sweet Potato, which has edible foliage and will come back from a dormant tuber?

Thanks for your response, Tyler.  Hmmm, the leaves do look a lot like sweet potato leaves, don't they?  I don't recall the stem/stalk of sweet potato to be segmented like these are, though, and I've never seen a sweet potato so upright in form - usually they're more trailing, aren't they?  I wonder if it's related to sweet potato, though.  I'll have to dig down and see if it forms tubers (usually I propagate by cuttings, as they root very easily).

Most likely Fagopyrum esculentum.
Sorrel family.
Common name?!
Let’s hear them!

Welcome to the forum!

I asked Mr google who said Fagopyrum esculentum is aka buckwheat.

since this is an older post the original poster might not see your replay.

For other interested:

https://permies.com/t/112512/Growing-Buckwheat-Naturally

https://permies.com/t/8348/Wanted-Perennial-Buckwheat-Fagopyrum-dibotrys

Certainly a member of the sorrel/knotweed family. Likely some kind of wild buckwheat or black bindweed, maybe genus Fallopia.

My guess is Fallopia scandens, common names wild buckwheat vine or climbing black-bindweed.

Wow, I'd forgotten I ever posted this! Thanks everyone for your input.

This plant is most certainly in the buckwheat family, but is definitely not regular old buckwheat (Fagopyrum esculentum), nor do I believe it's Fallopia scandens, as it does not twine itself around supports like bindweed does, as I see in photos of Fallopia scandens.

Awhile back, I actually came across a photo that looks a lot like my plant in the book Around the World in 80 Plants, and on further research I think it may be a match - Fagopyrum dibotrys, or perennial buckwheat. It makes a great, easy-growing summer green!