The Poison Ivy Family is a group of plants that includes poison ivy, poison oak, and poison SUMAC. SUMAC is a five-letter word that is part of this family, and it is a shrub or small tree that produces clusters of red or yellowish-white berries. SUMAC is native to North America, Europe, and Asia, and it can be found in many different habitats. The leaves of the plant are usually compound and have serrated edges. SUMAC is often used as an ornamental plant, but it can also be toxic if ingested.