Poison Ivy

Toxicodendron radicans

Photo of Poison Ivy
Photo by Dr. John Meade, weed scientist emeritus
Rutgers Cooperative Extension

This plant, like our mosquitoes, was here to welcome the invaders from Europe who had never seen it. The leaf is three lobed with the central leaflet on a short petiole. The two lateral leaflets are lobed on the outside edge while the central leaflet is lobed on both edges. The flower is hidden beneath the leaves and is green in color. The fruit is a small, white berry growing in clusters. All parts of the plant are poisonous at all times of the year. Poison ivy also has aerial rootlets which fasten it to trees, telephone poles, and other structures. It also grows as an upright plant. A single stem comes up from the underground stem. It can be identified by the aerial rootlets on the stem.

Additional Images

  1. Rutgers
  2. Executive Dean of Agriculture and Natural Resources
  3. School of Environmental and Biological Sciences