This is growing all over the pecan tree in my backyard, and I noticed yesterday is creeping into the yard under the tree as well. Is it poison (ivy/oak/etc)? There is also a “hairy” vine clinging to the trunk of the tree, but I’m not 100% sure it’s connected to this.
Yes, Beverly, I’m afraid that this is certainly poison ivy, Toxicodendron radicans.
Dr. Steven Hill, Botanist, SCNPS