McNair, James B. 1925. "The geographical distribution of poison sumac (Rhus vernix) in North America." American Journal of Botany, 12, (7) 393–397.
Poison Sumac (Toxicodendron vernix or Rhus vernix) is a woody shrub growing to 3 m tall. All parts of the plant contain a toxic resin called urushiol that causes skin and mucous membrane irritation to ...