Poison ivy identification is often summed up with the maxim, "Leaves of three, let it be!" This poison ivy ID saying also appears in slightly different forms, including:
- "Leaves of three, let them be!"
- "Leaves of three, leave them be!"
- "Leaves of three, leave it be!"
- "Leaflets three, leave it be!"
- "Leaflets three, leave them be!"
- "Leaflets three, let it be!"
- "Leaflets three, let them be!"


