Poison Ivy, Oak, or Sumac - Topic Overview
"Poison ivy, poison oak, and poison sumac are plants that can cause a skin rash called allergic contact dermatitis when they touch your skin."
Outsmarting Poison Ivy and Other Poisonous Plants
"First comes the itching, then a red rash, and then blisters."
Poison Ivy: Toxicodendron radicans
"Poison Ivy is one of the best-known, and probably the most-hated, plant in Virginia. Because most people are allergic to its sap, Poison Ivy can cause a nasty rash and blisters on the skin."
"Although poison ivy (Rhus radicans or Toxicodendron radicans) is easily identified and should be avoided, countless people experience a painful introduction to the species."
Irritating to Humans but Good for Wildlife
"Poison ivy is a woody shrub or vine with hairy-looking aerial roots."