Poison Ivy (E2946)

Poison Ivy (E2946)

Poison ivy is usually a creeping vine that uses aerial rootlets to attach itself to the bark of trees or grows horizontally along the ground.

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Identification

Poison ivy is usually a creeping vine that uses aerial rootlets to attach itself to the bark of trees or grows horizontally along the ground. However, it can also be an erect shrub. The bark is gray and can be covered with hairlike rootlets (Fig. 1). Twigs are slender and yellowish brown and can have fine hairs.

Poison ivy has compound leaves that consist of three leaflets. The leaflets are 2 to 5 inches (5 to 12 cm) long and green or yellowish green during the growing season and red in the fall. The leaves are arranged in an alternate pattern on the stem. The terminal (end) leaflet has a longer stalk than the lateral (side) leaflets.

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