Is this a poison ivy or poison sumac type plant?
This stuff is growing along the fence in my back yard. Someone who is doing work on my patio says he is extremely allergic to poison sumac and that's what he thinks it is. I bought some poison ivy killer but have not applied it yet. I can't find any poison sumac killer. I'm not convinced that's what this is. I'm including a few pictures. Does anybody have an idea what this is?