Ok , what do I do now ?The stuff with the fingers off it into tree almost certainly is. The brown stuff in pic 4 is most definitely not.
Hmmm... This is interesting , I have a lot , I mean a lot of Virginia creeper around. My wife handled stuff like this by mistake this weekend and had no reaction. And she is allergic to PI.It looks like Virginia creeper (Parthenocissus quinquefolia) to me. Virginia creeper sap not poisonous.
* 5-leaved (hence its namesake) brilliant consistently, red fall color - PI is 3-leaved (also nice fall color, but more yellow & orange)
* Fruit - dark, purple berries - PI has white berries
* growth habit - ground cover, but also a climbing vine that at times can grow throughout crown of a tree.
* both can grow in association with one another
"Hairs" on poison ivy vine are finer, more dense, and matted.
Buds much different.
PI will tend to have woody branches 90* off of main trunk vine and that extends a few feet from trunk vine.
It may be poison sumac as well. Does not matter much, the outcome is the same as poison Ivy. Note poison sumac lives in lowland areas.