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.

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

For more information visit:

Plant & Pest Diagnostics

Other Documents in this Series

Accessibility Questions:

For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu.