Attached are some photos taken from my backyard in Bowie, Maryland. My untouched backyard has full of trees and various plants & weeds. I saw these growing on the ground and continuing as a vine in a tree. Could you tell me if this is indeed poison ivy and how to kill these plants? I have three small children and I'm afraid that they will go to this area. And yes, you have permission to copy this photo. Please let me know. Thanks. Jerome Bruce Bowie, Maryland