This is NOT poison ivy. It is a raspberry
vine.
Here we have the classic three leaf configuration, but notice that the end
leaf is substantially larger than the two other leaves. Also see the finely
toothed edges to the leaves in addition to the slight lobes. The most
telling sign that this is not poison ivy, however, is the presence of thorns
along the stem. Poison ivy could have roots along a vine growing on a tree,
but these roots will grow into the tree, and look like hair that has
been parted with a comb on the side away from the tree.
