Poison ivy – Toxicodendron radicans

Poison ivy

Toxicodendron radicans (L.) Ktze.

Anacardiaceae (Cashew family)

Life cycle

Perennial woody vine.

Leaves

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.

Stems

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).

Reproduction

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

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

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Plant & Pest Diagnostics

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