Poison ivy – Toxicodendron radicans

Poison ivy plant

Poison ivy plant

Poison ivy plant 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 leaves

Poison ivy leaves

Poison ivy aerial roots

Poison ivy aerial roots

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.