Does anybody have any idea what this vine is? I thought it was some kind of poison ivy variant. It is not super bushy but is has grown pretty far up into an elm tree. I jus noticed the berry on it today. It is in a mostly shady spot with plenty of indirect light. The average temp for the past 2 months here have been around 92- 95°. I have looked all over the internet for info and it's time I turn to you lovely folks for some help.

Thanks,
Steve.

Compare it to Peppervine and see what you think.

That was my though also.
Peppervine (Nekemias arborea)

Thanks guys. That is absolutely it.