I learned the hard way that the bigger and older the stems/trunks of the vine are, the more potent the juice is.
They say, especially if you are sweating, to be SURE to wash thoroughly with soap WITHIN 10 MINUTES OF EXPOSURE. And put your clothing in the washer right away. Someone told me to also dip my gardening tools in alcohol, better than bleach to kill bacteria and get rid of any chemicals you might be allergic to. I also had a blister on my hand which burst, and the stuff got into my blood stream. As a result, I am highly sensitive to any kind of chemical, such as ChemPrime etc, brought on by extreme exposure on this one occasion. Before this, I was not reactive to poison ivy. But that can change, as I learned the hard way.

And here is a photo I found online, showing a poison ivy growing up a tree. I also give the link to the thread "is this poison ivy?" so you may also submit your photo there where they identify poisonous plants routinely.

There's a forum on GW for plant ID or you can go to your state's forum, if your state has one.

I think a visit to that website, uploading the photo there and asking your question there, will be answered definitively.

BTW, Virginia Creeper is like poison ivy here in southern Ohio--it covers every fence-post, and we pull it out by the cart-load. When I lived in Colorado, I knew people who actually BOUGHT the plants for landscape use!!

Thanks for the link. I have looked at so many pics and discriptions. The 3 leaves made me wonder what it was.
I also have a good bit of Virginia Creeper, wild strawberries, etc. Seems like the more I weed, the more I have.

My reference, TREES & SHRUBS OF THE SOUTHEAST by Blanche Dean, shows a drawing of it and gives the name AMPELOPSIS ARBOREA to peppervine. I quote:
"...leaves deciduous, compound, 2-pinnate or 3 sometimes, .5 to 1.5 inches long, toothed & lobed, bluish green & lustrous above, downy below, few tendrils, often none. Bark warty. Flowers small, whitish, in cymes at end of branches. Fruit inedible, purplish black. Common over the South, both wild & cultivated, climbing on walls & porches for shade. Swamps, coastal plain, FL to TX, MO, VA."

So not poison ivy.

hmmm, On second thought, I'll let my neighbor pull it up when he cuts the grass.

Virginia Creeper....yes we still buy it for planting and a great use for privacy. It can get away from you, but pulling the beginnings in the spring makes it go away.

I kind of like the virginia creeper.

When I drove home from south Texas after working on offshore boats, I'd pass through Palacios TX. In late August or September when there was not a strip of shade anywhere and dust was thick on every object, I saw a tiny trailer which had an arbor built to cover it. The owner had apparently intentionally planted kudzu, and it made a dense and cool looking shade over the trailer and a small patio just outside the door. Everywhere else in sight was being baked and looked so miserable, but not this place. It was the only time I ever saw a good use for kudzu.

I heard, don't know for sure, that it is illegal to plant kudzu in Atlanta. You know that the plants grow more than a foot a day and can cover up whole forests thus blocking the light. And it was brought over from Africa--big bright idea before environmental impact was thought about--to stop erosion on the farmlands of the southeast. One day they may discover some great uses for the biomass it creates. I hope so.

Speaking of shade. I have done all I can in the yard today weeding and lifting. I am going to sew. The shade of the new curtains is working nicely to cool the front porch even as little as I have up.

Chris