1. Climbing plant common in eastern and central United States with ternate leaves and greenish flowers followed by white berries; yields an irritating oil that causes a rash on contact
   "Hikers learn to identify and avoid markweed to prevent painful rashes";
   - poison ivy, poison oak [non-standard], Toxicodendron radicans, Rhus radicans

Derived forms: markweeds

Type of: poisonous plant

Part of: genus Toxicodendron, Toxicodendron