Season has arrived for poison ivy, oak and sumac; here's plenty of advice on how to deal with them and their rashes
Leaves of three, let them be.
This old childhood rhyme still holds true today, well at least for poison oak and poison ivy. Poison sumac has seven to 13 leaflets on each leaf. But the result is the same: If you come into contact with the oil from their leaves, you are likely to end up with an itchy rash that can last from one to three weeks.