Poison Ivy Poison Oak Leaves. But some kinds of poison oak have five, seven or nine leaves per cluster. They're shiny with smooth or slightly notched edges.
Confirming you ARE looking at poison ivy (also look closely for the hairy vine) Poison ivy leaves are compound leaves, that is, each leaf is composed of three leaflets. Another sneaky thing about poison ivy: It has some lookalikes. But some kinds of poison oak have five, seven or nine leaves per cluster.
The stem looks like it has tiny hairs growing out of it.
These invasive weeds will spread quickly if you do not control them.
The edges of the solid green leaves, while reminiscent of an oak tree, are less dramatic. Eastern poison ivy comes first, because it is the biggest cause of trouble, but it is good to know about both kinds of poison ivy and both kinds of poison oak. Outsmarting Poison Ivy and Other Poisonous Plants.