South Carolina, coastal plain.

What else can you tell us?
Do you have any pictures of the plant growing?
How fresh is the cutting?

The plant is gorgeous!

Just looking at it... I would suspect sunflower...

some type of jasmine?

does it ever flower?

There is a list of native plants of the coastal plains of South Carolina.

The only one which looks possible is Bignonia capreolata ..

http://scnps.org/wp-content/up...

http://www.plantplaces.com/per...

http://www.discoverlife.org/mp...:

Carolina Jessamine (Gelsemium sempervirens)

Frillylily said:http://garden.org/plants/view/76638/Carolina-Jessamine-Gelsemium-sempervirens/

I looked at that one but thought the leaves were too broad, it seems they can vary. The leaf venation looks to match, I can just see it on the leaf showing the back.

http://alabamaplants.com/Yello...

The only similar species is Swamp Jessamine (Gelsemium rankinii), which grows only in the southeastern corner of NC and only along blackwater river swamps.

http://www.carolinanature.com/...

http://www.dendro.cnre.vt.edu/...

http://www.dendro.cnre.vt.edu/...

I checked the photo against my Gelsemium sempervirens The leaves match, but mine is much fuller and is in bud. Possibly just not an ideal specimen in the photo ?

I have a bunch of Carolina Jessamine & crossvines (Bignonia capreolata) at my house... actually grubbing several patches of them out with the mattock this month... and the above picture doesn't look like any of my vines...

Still hoping for pictures of the plant in it's natural setting... Very difficult to ID plants when the pic is taken against a neutral backdrop....

And...

Even with really good pics... some of my plants aren't guessed at...