Recognize, Prevent and Treat Poison Ivy, Poison Oak, and Poison Sumac

Learn what causes poison ivy, oak or sumac rash and how to treat it, as well as tips on recognizing, avoiding contact with, and eradicating these toxic plants.



Eastern Poison Oak
Eastern poison oak (Toxicodendron toxicarium, also T. quercifolium).
KAY HOLMES STAFFORD
Caution Poison Ivy Sign
Poison ivy can be hard to recognize: not even botanists can agree on how many varieties there are.
PHOTO: FOTOLIA/NATALIEJEAN
Western Poison Oak Territory
Western poison oak territory in the U.S.
DON OSBY
Western Poison Oak
Western poison oak (Toxicodendron diversilobum).
KAY HOLMES STAFFORD
Eastern Poison Oak Territory
Eastern poison oak territory in the U.S.
DON OSBY
Poison Sumac Territory
Poison sumac territory in the U.S.
DON OSBY
Poison Sumac
Poison sumac (Toxicodendtron vermix).
KAY HOLMES STAFFORD
Poison Ivy
Common poison ivy (Toxicodendron radicans).
KAY HOLMES STAFFORD
Poison Ivy Territory
Poison ivy territory in the U.S.
DON OSBY











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