Poison oak typically appears as a shrub or climbing vine with leaves that resemble those of an oak tree. The leaves are often grouped in clusters of three and can have a glossy or slightly hairy texture, changing color from green to red in the fall. The plant may also produce small, yellow-green flowers and clusters of berries. It's important to note that touching any part of the plant can cause skin irritation for those allergic to urushiol, the oil it produces.
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