Poison sumac grows mainly in uninhabited areas, especially in swampy locations. Thus, hikers, hunters, and others who spend a lot of time in the outdoors should become familiar with its appearance. A small tree about 5 to 6 feet high, poison sumac has 7 to 13 leaflets arranged in pairs, with a single leaflet at the end of the midrib. The leaves are elongated and without teeth. Poison sumac can be distinguished from harmless sumacs by its drooping clusters of green berries.
Harmless sumacs have red, upright berry clusters.
Admittedly, avoiding these plants can be difficult. Poison ivy and poison oak grow almost everywhere, in backyards as well as in woods and pastures, although neither poison oak nor poison ivy grow at elevations above 4,000 feet. Wearing long sleeves, long pants, and gloves will help protect against exposure in heavily wooded areas. Animals usually do not react to urushiol, but since the resin may be on their fur, susceptible persons should be careful when handling pets. Give the family pet a thorough bath if there is any chance the animal has been in contact with the plants.