Hello Gardeners, I’m Amanda McNulty with Clemson Extension and Making It Grow. Sumac has a bad rap as there is one plant with that name that causes a terrible rash. It’s been moved from the genus Rhus and is now called Toxicodendron vernix. Many people freak out whenever you speak identify a plant they’re examining as sumac -- they think it’s going to give them a horrible rash. The facts are that , poison sumac has more usushiol than either poison oak or poison ivy does. If you are walking