How to Really Recognize Poison Ivy, Beyond 'Leaves of Three, Let It Be'
by Beth Skwarecki from Lifehacker on (#4K9HD)

Leaves of three, let it be" is a classic rhyme about poison ivy, and it's accurate: The plant's triple leaflets are a reliable characteristic. But if you want to know more about this itch-inducing plant, you need to learn a few more things.