Outsmarting Poison Ivy and Its Cousins: Article by Isadora B. Stehlin tells about avoiding contact with poison ivy, oak, and sumac, as well as treating the rash.
Poison Ivy Close Up: Identification photos of leaves and berries.
Poison Ivy, Oak, and Sumac Guide: Pictures, how to identify plants, where they are located, treatment of rashes, medical emergencies, myths and folklore, and how to prevent outbreaks.
Poison Ivy, Oak, and Sumac Quick Answers: Questions about poison ivy, oak, and sumac poisoning, identification, home and commercial remedies.
Poison Ivy, Western Poison Oak, Poison Sumac: Information bulleting from Agriculture and Agri-Food Canada covers identification of these plants; mechanisms, symptoms, and treatment of poisoning; avoiding contact; and eradicating the plants.
Poison Ivy: How to Identify and Control: Information from the Missouri Department of Conservation.
Stories | Poison Ivy Safety: Leaves of three, let them be; Berries white, run in fright. Folk Rhyme
The Poison Ivy Site: Poison Ivy photos, photo quiz, FAQ, Stories, and a poster to purchase.
Venom Factory: Basic information about poison ivy, oak, and sumac; product reviews.