Poison Oak

Pacific Poison Oak

Toxicodendron diversilobum (Torr. & Gray) Greene

Anacardiaceae (Cashew Family)

▲ ▼ large plant climbing on a tree

▲ ▼ vine climbing on a tree

▲ thicket of upright, non-climbing stems

▲ ▼ young growth along the ground

▲ ▼ stems with fruit (unripe, above) (ripe, below)

Toxicodendron diversilobum (Torr. & Gray) Green; Pacific Poison-Oak: (Bayer Code: RHUDI; US Code TODI)

Similar to poison ivy in appearance, but Pacific poison oak has lobed teeth on the leaflets, like a white oak, not smooth leaflet margins or pointed teeth on margins, as on poison ivy
Is not found east of the Rocky Mountains
Leaves, oils from sap can cause allergic reactions in sensitive individual

(Updated January 15, 2019)