Poison ivy – Toxicodendron radicans

Poison ivy

Toxicodendron radicans (L.) Ktze.

Anacardiaceae (Cashew family)

Life cycle

Perennial woody vine.


Alternate, compound with three shiny leaflets. Leaflet margins may be smooth, toothed or lobed. The side leaflets occur on very short stalks; the middle leaflet occurs on a much longer stalk. Leaves may turn bright red in the fall. Contact with any part of this plant can cause a reaction in sensitive people.


Shrubby or climbing, woody vines are supported by aerial roots.

Flowers and fruit

Small, inconspicuous, yellow to green flowers have five petals. Fruit are gray to white berries (drupes).


Seeds, creeping roots and stems, which may root if in contact with the ground.

Poison ivy plant
Poison ivy plant
Poison ivy growing on a tree
Poison ivy plant growing on a tree
Poison ivy flower cluster
Poison ivy flower cluster
Poison ivy flowers
Poison ivy flowers
Poison ivy leaf
Poison ivy leaves
Poison ivy aerial roots
Poison ivy aerial roots

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