This picture is from Wikipedia and you can read the full article here.
Today I gave Little and her 4 Cousins who are up from LA a lesson on how to spot poison oak. This is what i looks like by us though there might be different verities out there. Here is my how so helpful lesson. Look at the leaf see the oil? The Oil is the problem. It will get on you a spread and you will be covered in icky red itchy patches. Unless of course like me your immune. Yes these leaves are red, but they are not always red. Especially when they are new they are green and sometimes bright yellow-green. The leaves are important though. “leaves of 3 let it be” a nice saying I learned in Girl Scouts. See how each cluster of leaves are in sets of there. I am told poison ivy is like this too but I have never seen that. One last thing to look for, the stems of the plant. The vines will grow up trees and really anything they can. You can see that a little in this picture. So if you see a mass of very oily leaves that come in a set of 3, on a vine, growing rapidly up something, best not to touch it.