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Weed Identification in Nurseries and Landscapes

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Poison ivy - Toxicodendron radicans (L.) Ktze.
Weed Identification in Nurseries and Landscapes > Poison ivy
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.
Poison ivy root Poison ivy leaf
Compound leaf of poison ivy.
Poison ivy flower
Poison ivy aerial roots. Poison ivy flower.
Poison ivy plant
Poison ivy foliage.
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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Updated: 10/18/07